You haven't heard anyone say this, you haven't talked to every tankie in existence. I have heard someone say it, and yes they were dumb but of course that goes without saying since they were tankies who think the vanguard party will actually "dissolve on its own when the time comes" LMAO as if.
But more importantly is the whole "hey dummy they're going to kill you next like they've historically done" part. Don't help hopeful autocrats, they are not "on our side" because "the enemy of my enemy is my friend." The enemy of my enemy is also my enemy when they're just going to kill me next.