I don't agree with everything Jordan Peterson says, but virginity with flying into a murderous rage... there is a difference between saying there is an excuse (justification, condonement) vs saying there is a cause (which any clinical psychologist is bound to understand in another).

I don't think JP has ever told his students or audience it is acceptable to fly into a murderous rage.

Again I don't necessarily agree with all he has said, but if you try to tarnish him by twisting his words, it will actually drive more people into his camp - as they will be more likely to check him out.