I'll bite. No, we don't "know" he targeted the gay bar, but we do know it was/is in fact a "gay bar". Nothing wrong with reporting that the bar was a "gay bar". Credible journalism would also, in fact, be "It's unknown at this time what the attackers motives were, but based on the alleged shooter's attire it would appear this was a planned attack."
Those of us on the message board, though, should be pretty open to point out this was most likely a hate crime. Typically, scorned lovers don't go all SWAT in a clearly orchestrated attack. Again, I'm open to eating crow.