I was only speaking of what I have generally observed in atheists. Your post caught my attention because of the terms 'militant' and 'angry'. I know what you mean my 'militant'--strong and determined. Coming from a family of atheists, I have a soft spot for them. Those in my family are not militant, so I was puzzled when I first met up with some online. No atheist in my family was forced into church or religious education early in life. They simply knew they held no belief and moved on from there. No one forced them into trying to believe.
Many atheists have trouble with how God is portrayed in the Old Testament. I had problems with that myself, but instead of sticking with what modern English--and Christianity--said about it, I delved into the ancient languages, ancient cultures, and scholarly Jewish commentary. It was amazing. It also took years and years of study. I had the immense interest to sustain that and lucky enough to make the time. The average person simply does not. Life is too short.
There are some atheists who come online who make every topic about the people posting...boring....
But perhaps you are right--those militant ones (be they atheists or not) who turn away from the topic to instead discuss those who post--may very well do that because they are angry with the one who is posting.