Found in Naomi Klein's Doppelganger. The one lesson I wish the modern left would internalize more than anything.
Use shared language.
Don't use lefty jargon when the person you're talking to doesn't subscribe to these ideas. No white privilege, no colonial oppression, no intersectionality. Translate to a shared language, built on reasonable, common assumptions and do the work required to bring people on board.
Because you can be damned sure the MAGA crowd are doing the work.