This is the Hegelian Dialectic at work. Brother A says, "I'm not touching you! Does this annoy you? I'm not touching you!" Brother B hits Brother A, then a fight ensues. The end result is the fight that A wanted, but wanted B to initiate. They want to sacrifice these doorknockers to someone unstable who may initiate violence, so that the corporate media can push the message that anti-vaxxers are dangerous terrorists. Especially if it's a white person.

Moreover, this is also likely a test run for gun grabs.