Absolutely on ideology the rest absolutely not, there certainly are transphobic dog whistles, or light hollers like that recent non reproductive sex being bourgeois post (which is homophobic and misogynistic as well).
Leftpol/stupidpol types are social chauvinists ruled by their emotional bigotries, asking someone to change how they feel (they certainly aren't ruled by any sort of logic there) about something they've likely held on to all their lives takes time. In trying to defuse them here, yes you're going to risk them dog whistling all sorts of things.
When all you know is to be an asshole, all around you are assholes, what are you going to do? Be an asshole. Fuck them and they got issues.