Justification for Complete Association

These past few weeks, there have been a number of terrorist attacks across the world.  There's been numerous deaths involved because of the attacks, and ISIS has claimed responsibility for some of the attacks.  But all that a lot of people focus on when they hear about Isis is Muslims.  People point fingers at Muslims, claiming they are responsible for ISIS and all of the attacks committed by ISIS.  But when the KKK do something frowned upon, why don't all white people get blamed for the actions committed by the KKK?  It also seems to be that it's always white people pointing fingers at Muslims.  I understand that people want to blame Muslims for ISIS and everything that occurs under ISIS, but I don't think it's right to do so.  In situations like these, it's easy to find a scapegoat (Muslims) and claim they are responsible for everything.  People think that if they could isolate Muslims like Hitler did with the Jews, they could stop ISIS.  But as long as people always isolate and point fingers at Muslims, terrorist organizations such as ISIS will always exist.  In my opinion, I don't think there is true justification for completely associating a whole race or religious group with a terrorist group because that terrorist group represents a miniscule percent of that race or religion.