I'm one of those ex Christian. As much as atheists hate the word "faith", it is actually one of the most powerful things that can lead believers "astray". It is the belief that God is indeed all loving that it claims to. As a religious person, I didn't have knowledge that atheists have and was discouraged to use my logic. But I strongly believed that God was good, nothing like the one that religion introduce to us. That's how, many apostates turn away from religion. That's why, many ex-religious used to be the most faithful and have a vast knowledge on religion.
Not sure I'm getting this samyaza? Are you saying that people "of faith", have a certain faith in their God, but then start to question their religious tradition and/or their religious leaders because they are not presenting the same picture of God that they have faith in? So, they believe God is good, but then hear a story of a bad God, presented as truth, so they turn away. Something like that?