Nah. This is about gun control and turning whatever other screws can be turned on the American people.
I have a hard time seeing this being about gun control. The (extremist) folks angry about gun control would probably cheerfully blow up a government target, but I don't see them hitting a bunch of athletes. If for the sake of argument we wanted to call this a "false flag" operation by the government (and I don't for one second think that it is), a gun control motive would really need to involve shooting up people with guns, not blowing them up with a bomb.
Hi John et alia,
Your line of reasoning seems to me to be sound. As to who is responsible, maybe they're far-right crazies. Maybe they're Muslim crazies. Or maybe they're just plain crazy. I'd include far-left crazies for the sake of parity, but honestly, the last time the far left crazies did anything this mean was 35 to 40 years ago. We shall see what happens.