Yea, I don't think he's asking you guys literally to wash the blood off your hands but to acknowledge the inflammatory, partisan hackery (which you now accuse everyone of doing yourself, mind you) where conservatives are shouted down as fascists/deplorables for holding even the mildest of positions.
If you want to fight radicalism you should want to address the root causes of it. How can you do that when you can't even acknowledge what's happening? Rhetorical question, you can't.
It reminds me of the "nominal" Muslim running defense for the radical one causing violence. Cut from the same cloth.