Any sentence that begins with "many" or "some" or "all" is impossible to answer. Many people in the US believe all "black," "African Americans," or, in today's postings, n*ggers," to leave the USA, be killed, be returned to slavery. I do not believe these people speak for the majority or are indicative of today's political views.
Why is some behavior by some people - and not just Muslims - acceptable? Read the posts on Yahoo! about amending the Constitution so that women lose their right to vote. “I want the n*gg*r race to die they came from africa and they are pure scum. when?” https://answers.yahoo.com/question/index?qid=20161229194236AA1o2ax
“Why do white supremacists hate nggrs?” I HATE NGGRS AND I AM NOT A WHITE SUPREMACIST” https://answers.yahoo.com/question/index?qid=20161229194317AA1FaYX
“Black slavery was good and right. i want black people to get their chimpanzee arses back to africa. HOW LONG DO I WAIT FOR THE NGR TO LEAVE?” https://answers.yahoo.com/question/index?qid=20161227153857AAq1fas
I realize you are speaking of Muslims and the Middle East. However, that is NOT the only culture that holds the beliefs about which you are complaining.
I DO NOTE that Yahoo!, despite having these "questions" reported, does NOT find an issue with them. YOU certainly could do more to stop hate in the USA than you can accomplish by questioning how Muslims in other Countries think.
This is as unemotional, un-snobbish an opinion as I can or will formulate.