I agree with you, many of the religious people I know are great people.. most of my family is Catholic and we all got together 2 years ago to celebrate the wedding of my male cousin to his husband.
However, my experience is these same people lack critical thinking skills. They are taught their entire life to obey and therefor never question direction they are given. Sometimes they can be frustratingly naiive about current events.
Personally, I tread lightly when religion is being discussed except with my closest friends (some who are athiest, some who are some sort of Christian). Many times I don't feel it's worth the fight.. when someone will admit they are christian because that is how they were raised, there's almost no amount of "evidence" that could ever change their view.