More likely, they will claim it was a member of one of the churches who did it, maybe even a disgruntled pastor (that is the ultimate liberal media dream). They don't get any propaganda value from blaming it on gays.
And if it does turn out to be ACT UP or some other gay outfit, the story will be instantly spiked. It never happened.
The MSM is the closest thing on earth to modern Stalinism.