DKIG speech is advocating the death penalty for a known innocent group.
I don't see why this speech should be legal. If the left transitions from advocating the banning of hate speech (which is really just GOP speech) into DKIG speech, then they largely get what they want wrt preventing trans groups and similar from getting killed (which even the Matt Walsh types don't want to murder Dylan Mulvaney; they will merely argue Mulvaney is a man). The left is worried that the right wants to murder Dylan Mulvaney at some point in the far future; but if you knip DKIG speech in the but, then you end up preserving the legalization of speech the right actually wants (ie, calling transwomen men).