Everyone has condemned him. No one applauds mass murder, period, no matter who is the victim.

There is no support whatsoever for his actions, he does not claim to speak for any ideology, group or movement, unlike Muslim terrorists,  and no movement has come out in support,  so who should be trying to distance themselves from him?

The implication that there are large numbers of people applauding him, and that society has to keep those in check through mass demonstrations of disapproval, is ridiculous, and an indication of how warped "the left's", for want of a better description, thinking is.