riley, I commend you for your honesty in admitting to a forum of (mostly) atheists that you have serious questions about religious belief. That is more than most theists who post here are willing to do.
If most if not all, ( and I am not saying all, as I would not know) religions sway from the very beliefs of what ever God they confess to following, then why would they follow any? I mean, what would be the point?
Does anyone have a logical reason for that sort of behavior? Do they truly believe that they can just make up the rules as they go along?
Your first question here was crucial to my letting go of my own faith (Evangelical Christian). I realized I was cherry-picking Biblical scripture and making up my own doctrine to fit my needs. What was more, so was every other "Christian" that I knew
. How could this be, if we were really all worshipers of the same god?
A logical reason? Not many, though there are some; material success, for the pastors and staff of prosperous religious institutions. Many, many more emotional reasons though: the comfort of the familiar, the appeasement of fear (of dying, of being excluded, of eternal punishment), confirmation and affirmation of one's beliefs...
I think most believers don't see it as "making it up as they go along". Since religious doctrines are so prone to individual interpretation, it seems obvious to them that their self-projection is being confirmed by the doctrine itself.
If that be the case, how do I know beyond a reasonable doubt that I am worshipping the Lord in the correct way?
One of the big weaknesses of Pascal's Wager. Again, kudos to you for realizing this.
It seems like knowing which religion is the true religion of the one and only God ( if one exists, I believe one does) is an unreachable quest.
I am some how sadden that I have no argument against what you are saying.
Leaving faith behind is a far from painless process. But if that's where your questions really lead you, take some comfort that you're not the first. A moral, happy and fulfilling life as an atheist is certainly possible.
Heck, even if you don't abandon your faith, asking these questions is useful. It shows a willingness to consider other points of view that, again, a lot of theist posters here decidedly lack.