First off, I have friends who are Arab and who I think, based on your commentary, are probably considerably more civilized than you.
The word "Arab" is a term for panethnicity in much the same way that when Europeans talk about "Americans" they may be referring from everyone in Canada to Argentina or when people refer to "Asians" they could be talking about anyone from Japan, China, Vietnam, etc.
As such, "Arabs" have vastly different ethnicity, cultures, religious beliefs, etc. There are Arab Christians. There are Arab Americans. There are Arab Conservatives.
The sectarian violence in that part of the world is as typical as the feuds that existed between European countries for centuries and which it took a World War to finally settle albeit you still see signs of it economically.
So I don't agree with your blatant, ignorant prejudice. My reasons for wanting to stay out of the Syria conflict is the same as why isolationists wanted to stay out of the first World War. It does no good to get sucked into conflicts that have been going on for centuries.