It's pretty simple really.
Take two figures that the left doesn't like. George W Bush and Donald J Trump. The former didn't constantly spout borderline racist comments. The latter does. GWB was rarely attacked as a racist. DJT's racism is widely discussed.
even though GWB wasn't that long ago, it was a completely different time. SJW culture hadn't permeated all aspects of modern life and people hadn't been trained to get offended by everything yet. heck mainstream 2004 opinions would be very "literally hitler" by todays standards