Oh really? To play devil's advocate for a moment, why don't you extend the same courtesy to them that the left do to Islam? I'm sure those lynchers were just a few bad apples, a few extremists, and you can't judge the whole organization for their actions. Right? Or maybe not.
Yes if the percentage of extremists relative to the size of the whole organisation is minuscule (there are 1.7 BILLION muslims). Not to mention the muslim community (if there is such a thing) is much more diverse then the KKK.
This is like saying that because there is a KKK that all white people are racist.