And before that, an offhand comment by Trump that people misinterpreted as a call to assassinate Clinton.
People have problems with not only reading these days, but listening too. They can’t parse sentences correctly or comprehend texts. And when it comes to listening, they hear what they want to hear, not what was said. (Try to communicate in the presence of one of the Sensitive Special Snowflakes and you’ll find that out soon enough!)
Trump’s speech bordered on sedition, implying his listeners could stage an armed insurrection against Clinton in office. Coming from someone who has already said he thinks the election will be rigged against him, that was something he should have never said.