I quote Mussolini all the time, and Goebbels too. Despite my usernym, I don’t believe in the doctrines of sympathy and contagion! Whether something is true, meaningful or just illustrative, it doesn’t matter if someone else said it first.
All that being said, attribution is important (Josef Mengele, Brazil, 1977).
I like this thread as a place to find pertinent info to pass on to Trump voters, although I sure wouldn’t send one of them here. Thanks for starting it, @funruly!