I don't know about that. I know plenty of people on the left that have gun 'obsessions'. I think it's just culturally unacceptable for them to talk about it. Here in Eastern Massachusetts, pretty much everybody (who doesn't tout their minority right-wing victim status on the back window of their pickup truck) will tell you they are anti-gun; but if you feel them out carefully, a good number of them will quietly admit they own guns and enjoy shooting. There are many, many hidden gun collections here.