Yes.
Someone should look up the meaning of the word politics. Of course the question of how a government should regulate firearms is political. Seeking a policy solution to a mass murder problem isn't "politicizing" the events which are the problem. It's just reminding citizens of the problem and prompting a continued push to action. We aren't going to miraculously cure all mental illness, nor get rid of all guns in the hands of the mentally ill (or chronically angry) but we sure as shit can back policies that constructively work on that.
Asshole mitigation, however, is beyond the purview of politics.