If we apply the same logic to KKK as we do to islam, KKK is a peaceful organization. Not every KKK member has ever killed a black person, have they? No, and the KKK members who do commit violence are not acting in the true spirit of KKK. So, it isn't fair to condemn the entire organization because of the acts of a few. Don't allow yourself to become KKKphobic. Be friendly to KKK members. Have one over for drinks or dinner or a cookout, just to show how broad-minded you are.
While you're at it, you should also invite a member of NAMBLA. Not every member of that organization has raped a boy, and those who do aren't acting in the true spirit of NAMBLA. Don't be a NAMBLAphobe.
Same for aryans, white supremacists, neonazis, neofascists, etc. Don't condemn them just because they think differently than you do. They are really nice, peaceful people. Be nice to them.