I don't think anyone is actually questioning that he was deliberately attacked. It also appears that the attack was politically motivated rather than random homophobia. The uncertainty seems to be whether the attack was premeditated.
The tweet posted earlier has OJ saying it was premeditated, and he clearly believes it was, but with the evidence as so far made public, I'm not sure we can yet say definitely one way or the other.
It can only be premeditated if the perps knew he would be in that establishment at that time. Otherwise it’s opportunistic or random.