To answer your question, I've had many discussions with Muslims and had no problem at all - please tell me more about these discussions. Did you tell the Muslims that you didn't believe in Allah? That if Allah existed, you would regard him as violent, cruel, homophobic, misogynistic, tyrannical?
Did you tell them that you viewed the Qur'an as the word of men, not God? Did you tell them your views on Muhammad? On Sharia law?
Yes. why?