Not that I'd espouse a strategy of deceitful propaganda, but claiming that deceitful propaganda strategies don't have any effect seems to ignore reality.

Leftists are pointing their fingers at conservatives and calling them fascists, and that lie is so big, and repeated so often, that it's actually now part of the dialog.

Perhaps you don't have to mimic the deceitful trash that lives on the left, but it's silly to pretend that their immoral deceitful tactics are completely ineffective.