Truthfully, I'm not surprised there is a gun club for the left leaning. That it's in the San Francisco area, yeah, that's unexpected. But there are a lot of liberals who hold their guns and gun rights dear. Liberal lawmakers never seem to want to believe that, but it always bites them in the backside when they try to impose draconian gun laws on the electorate.
Colorado is a perfect example. Democratic lawmakers who pushed through strict gun laws after the Aurora theater shooting found that out via the recall. And it's not just hunting; a lot of liberals believe in the right to own guns for self protection.
I think the depiction of the NRA in this piece is a caricature. But that not withstanding, I applaud a group of lefties who gather to celebrate gun ownership.