Sometimes the most horrific explanation is the simplest-- "because I can!"

Why shoot people?  Because I can.

Why act like an arrogant lout?  Because I can!

Why become the President of the United States?  Because I can!

Do I blame Trump for the shooting?  Absolutely not.  Do I consider him a model of benighted entitlement that facilitates these kinds of abhorrent behaviours?  Definitely.

Trump simply represents the pinnacle of a long history of shoddy, uncaring, incompetent, immature, self-centred leadership that finally stripped away the veneer of civility and revealed its core nature.  

Every leader in every position in the US, from industry, to politics, to education and government owns these deaths and injuries.  Their own greed, avarice and dishonest disinterest in the welfare of others has led everyone down this path.

Read about the Berlin airlift and then look at America today ... what a disgrace it has become.