Good question. I'll give you my perspective and you can take it for what it is.
I was raised solid Christian in a Protestant (re: non-Catholic Christian) church. I believed in the teachings of love and the morality, but I also questioned many of the "rules" that were imposed upon my life. Some of the teachings, like creationism, just didn't jive with what real world facts laid out. The more I questioned, the less answers people had, and more than a few times I heard "Well thats just how it is". Not a good answer for me, and apparently for the many people that have since left religion themselves. Which is what I did, left Christianity behind.
I kept my moral compass... morality makes sense living in a civilized society. Mere anarchy cannot be loosed upon the world (props to Yeats). And I became heavily involved in the sciences through school and as a hobby. The more I studied subjects like modern unification theory, evolution, quantum mechanics and cosmology the more amazed I became at the complex, living nature of the clockwork of the universe. You know what I found in science? I found God, a unifying force, beyond comprehension, master of an intricate cosmological system too far complex to have ever evolved by chance. To me, science became at every turn a measure of the wonders put into place by a higher motivation. A God, if you will.
Maybe I'm crazy, but to me, evolution looks like a reasonable tool used by God. The Big Bang looks to me like the handiwork of a greater will. The multi-dimensional universe we live in contains so many things beyond our comprehension, it's eerie. As humans we live in only four dimensions, 3 axis of space and one of time. But according to recent discoveries it looks like the universe we live contains no less than 10 dimensions, and perhaps as many as 26. What does this have to do with God you might ask...
Think of humans living as 2 dimensional stick figures on a sheet of paper. We have width and height, but the dimension of depth is alien to use. If we exist inside a circle drawn on that paper, there is no escape for us, we are limited to our 2 dimensional nature. Now, suppose a three dimensional being lifts us off the page, using its perception of depth to alter our enviroment. To our 2 dimensional minds this would seem miraculous. So take this a step futher: to a 4 dimensional being living in a 10 dimensional universe would be severly limited to its understanding of what is truely reality. God, beyond our 4 dimensions, would indeed act in "mysterious ways".
So science opens the possibilty of a God being, but what does that matter to us? Why should we worship and love such a being, and more importantly, if we choose to do this, how should we do it properly? Who truely knows what is right in relation to God? These questions started being answered in my life as I regained my faith in the existance of God. Much like gravity, which cannot be measured or seen (nobody has ever proven a graviton exists), still effects our lives daily, I started seeing God effect my life and the lives of those around me. People without hope, having incredible courage and will to go on because of their faith in God. People finding amazing oppurtunities because of their faith in God. And on and on. Do I have proof God has a hand in my life? No, I do not. But I have seen enough of Gods impact on others that I can believe in Gods interaction with humans as much as I can believe in gravity ensuring I dont fly out of this chair.
So the question remains, how to worship God? The oldest religions on record are Judaism and Christianity. That flies in the face of popular belief, until you learn that Judaism is rooted in the beliefs of the Ancient Sumarians, which is the earliest known recorded religion. To me, there is a certain comfort knowing that my recognition of a greater God is the same recognition given by the earliest civilized man. The turning point in this religious heritage are the teachings of Christ. His message of love, loving God, loving others and loving yourself is revolutionary. It not only summarizes the basis for so many religious teachings to their barest core, it is also an extremely positive way for civilized people to co-exist and interact!
So who's right about Jesus? Who has the right teachings? For my wife and I, we went back to the first Christian Church - Catholicism. We learned what it was actually about, why the guidelines it sets for people are really based on love, and understanding it's reform from a time a corruption was critical in us choosing it as our base. Like all things, it has evolved through time. Im sure there is a protestant church or two out there that is close to this, but too many protestant churches have no unifying voice. Any persons opininion can be taught as moral law, and thats just not for me. So much of the bad rep Christians get is because a protestant figurehead has decided something or someone is sinful or evil, based on their own deductive reasoning. And it spreads.
Are homosexuals evil, to be hated? No more than any person is that sins. None of us are perfect, we all lie, we all cheat, we all commit that one thing, not so good, against ourselves, against our neighbor, against our loved ones. Intentional or not. To give in to the hatred of one another, to give into the selfish desires of our own betterment at the cost of someone else, that is the true sin, and that is the root of all that is bad in this world. Mans inhumanity towards man.This goes against the sacrifice Jesus made for all humanity... his life for our betterment. He set the ultimate example of love. Laying down his life so others could live.
God, whatever God is, beyond our comprehension or imagination, interacts with us. I believe, as much as we understand love, God loves us. The promise of becoming more than our limited selves upon death, of a form of redemption, is to me the only reasonable thing to keep us going. Nothing we do on this Earth is permenant. What difference will you really make in your life? In less than two centuries each of us will be nothing more than a recorded photo or audio recording for our families, if we're lucky, to flip through and wonder about. Power, wealth and fame are all fleeting. Without love in our lives, without the promise of becoming more, this life is pointless. To gain success, to gain power, pleasure only to have it yanked away is pointless.
But thats just my opinion, one mans story... if it inspires you, then it was worth it. If it makes you think, then it was definetly worth it.