It could be random, but a neo-nazi troll with his level of notoriety makes it more believable that someone followed and killed him.

Like if OJ Simpson turns up dead with a knife in his back, it’s possible that he was the unlucky victim of a random killer, but it’s more likely he was targeted.

It could also be both; not because someone recognized him, but still because of who he is (non-random). Maybe he was just said some neo-nazi shit to the wrong person.