Just look at the response to the Jade Helm exercises to get an idea, and that didn't even involve murdering anyone.

https://en.wikipedia.org/wiki/Jade_Helm_15_conspiracy_theori...

I can't imagine what would happen if federal agents killed someones son, wife and dog in a firefight when executing a warrant based on a crime that looked like entrapment while a Democrat was in office.

Um, no, I cannot imagine that.