The catholic church spent a great deal of time whacking anyone they considered a heretic long before the enlightenment.
True, I will give you that one.
But there was a distinct shift once the Enlightenment occurred, which has definitely contributed to how the Western mindset views the practice of faith.
But how do you know that God is all warm fuzzy and loving?
Fixed! To clarify, the sort of love I'm describing isn't "warm and fuzzy." (It hurts the lover like hell, most of the time.)
How do you know that he doesn't demand strict adherence to his commandments? What if you spend your life on the "all you need is love" track, you die and *oops* the snake handlers were right or the mormons?
My viewpoint? If they
are right, I'd rather spend an eternity separated from the god these people serve, because I'd hate every moment I'd have to spent with him. (Make sense?)
What I want to know is how do you know that your faith is correct?
I don't. (I have been struggling through this issue for the last few years, and am
still down in the pit with it...

)
In the end, all I see is that each one of us has to look at life and use what resources are available to us and make decisions to the best of our ability about what we believe and why... and always be willing to learn and change to accommodate new information.
This is the problem with "revelation-based" theologies. You're given a nice pretty package with a bow on it and told what is true, and then your job is to conform to it, regardless of what you yourself would like to believe or think might be true. You now have to submit all of your normal observations, even the ones that might not fit, under this umbrella of faith. Sometimes that is easy, sometimes it's difficult; and sometimes it makes no sense.
That does not work well for an INTP, let me tell you. (And obviously it does not sit well with our ISTP brethren either.

) I tried to do it for a long time, and finally couldn't do it any longer.
So what do you do for ethics/faith? How do you know that your particular moral value system is true -- at least true enough to act on and live by? What things convinced you that the things you think are "good" are actually good?
I'm going to keep this inside christianity, the christianity vs all-other-religions is another discussion entirely.
That's fine.