Conservatives do NOT shoot up crowds of people, regardless of skin color and regardless of what day of the year it is. No way. No how.
In order for that to happen it takes:
1) An unstable leftist
2) An unstable apolitical person
3) An Islamic terrorist.
If you go back into history starting with the Columbine shooting, the overwhelming majority has always been an unstable leftist. A much, much, much smaller percentage are unstable apolitical people, that is to say, people who are not interested in any political ideology. And lastly and a much smaller percentage are are Islamic terrorists.
The law of averages would dictate that there has to be at least a few conservatives, and that might be true but of all of the ones I've looked into, it has always been in those three groups with almost all of them being in the 1st group.