I'll criticize prayer.
You have over 2000 years of fecking history to learn its bullshit that won;t stop anything. Its 2017, stop pandering to mythos.
From the 1st crusade with perter the hermit (who killed entire towns and then ate them) to 60 million dead in world war 2 and the 15,000 Americans killed every year by guns, prayer has done feck all for anyone. Ever.
Your god either doesn't exist or is a sadomasochistic bastard who could stop innocents being slaughtered but sits and watches. Either way, its not someone to turn to when you need help. And certainly won't stop the gun violence in America.
Trump even overturned Obama's very minor attempt to curb the deaths, and all that did was mean people with mental illness had some restrictions on what guns they could buy.
And why does all this happen? Money. Straight up bribery from the NRA. Trump calls himself a christian, doesn't burst into flames. You god gives no shit about you.