They are not insane. They are trying to destroy Trump and keep advancing their leftist agenda.
The Left has overplayed the race card so severely and frequently that they have become an running joke.
Nobody—not even many Democrats—believes their lies anymore. The only people who believe such tripe are living in bubbles in their big cities and coastal enclaves. The vast remainder of the populace sees exactly what is happening.
Everyone needs to keep their powder dry, boycott those who disrespect the flag—such as the NFL—and make sure they vote in 2018 and beyond.
Aside from that, the People need to prepare for War. Because the Left is going to get the civil war they've been fomenting—but it's not going to turn out the way they're expecting...