Honestly, I think we are hiding our head in the sand if we don't admit that the country has changed significantly since Trump took office. Vitriol, division, and open hate, has increased exponentially. That may/may not have happened if Hillary had won the election. We will never know.
I, also, think we are hiding our head in the sand if we don't admit that tragedies like this were happening in this country before Trump ran for POTUS, so clearly, we can not foist all of the blame on him.