I think some of these news agencies get carried away and are trying to blame Trump for every thing under the sun. I also think Trump kind of set the pace for a lot of these agencies by calling them all fake.
That being said let's see what they uncover about the shooters motives and then we can have a more informed discussion about whether or not Trump's rhetoric bares some responsibility in motivating these mass shootings. In any event let us hope the Prez can read the gravity of this situation and refrain from outrageous tweets for a time till things settle down. That's behaving responsibly if you ask me.
What worries me is that with all these mass shootings we might have more by copy cat killing encouraged by these being so close back to back.