You’ll disagree with it. You won’t refute it. You’ll walk away feeling better and convinced that you “won” but in reality you’ll have just marked yourself as an “enemy” to be ignored. (The human brain is very adept at compartmentalizing things.)

Actual refutation of a toxic idea whose seed has been planted requires detailed deconstruction and reconstruction. It is time-consuming, it is exhausting, and it is unreliable to boot. (C.f. above that compartmentalizing of things.) There is a reason why governments and centuries come and go but culture remains recognizable over the millennia. Once minds are set, they’re ludicrously difficult to unset.

I’m going to guess, however, that you will not take this to heart. Ironically for the same reason that your “refutation” (actually mere disagreement) won’t take.

Refutation does not equal correction in this circumstance. Simply discrediting their rhetoric in a discussion does not necessarily reverse the effect it has on the less critical-minded. They can overwhelm via a strategy of “lie early, lie often”.