I feel like we're in slippery slope territory. I didn't think GW Bush was great, but I thought people calling him Hitler was absolutely ridiculous, and him getting personally blamed for 9/11 was also ridiculous.
I don't think Trump is Hitler either. Some do. But we are clearly getting more divisive, it seems like a downward trend. Right to be wrong, or a culture change or large unifying event might reverse this.
Two huge events ?
9/11 and the Lehman Bros crash. Very divided country as a result of it.