And it’s especially that very last part where President Trump identified Antifa in all but name that sent the left into hysteria over Charlottesville. He called them out and they didn’t like it one bit.
Mayor Koch did that too, back in the 1980s.
He criticized commie protestors in NYC, but he called them "people who don't believe in private property." It was an effective way of marginalizing them instead of himself, and they couldn't deny the accusation.