Because they have no moral center: they’re “bring it all down man,” commie nihilists. And when they say bring it ALL down, they mean even the kitchen sink–including themselves.
They pave the way for totalitarianism. They relish it!
Why?
Answer: Liberalism is suicidal mental disorder.
And it’s not a respecter of race, ethnicity or national origin. In that sense, the psychosis is egalitarian, inclusive and an equal opportunity offender: effecting whites, blacks, browns et all with the same destructive fervor. Some groups just seem to be a little better at it – if I may be so charitable – like the Irish.
There you go. There’s your answer…