So, basically, you do not know any devout Muslims. None of them go to the mosque on Fridays or spend time in the Muslim community. You only have friends who have left their faith. You are only exposed to the negative opinions. That explains a lot.
How many times have you or your family members been attacked by Muslims seeking to behead you for being an unbeliever? How many times have you seen something like an Islamic beheading of a non-believer happen inside the US borders? Are you claiming that none of the 2.6 million Muslims that live in the US are true Muslims? They might disagree with you.
The only hate speech that I see on this forum is coming from you - the atheist. I don't see any religious believers spouting the same amount of hate speech that you have admitted to.