People have a strange sense of what's appropriate to show children. Apparently (and I say apparently, because I have not watched the Walking Dead recently, as it just kind of evolved into the same thing every season) the newest episode had a scene where two guys kissed each other. And so cue the idiots saying how that isn't appropriate for their children, implying that they watch the Walking Dead with them. So one of the goriest shows on TV, which frequently features gruesome deaths in explicit detail, is all well and good for children, but the second two men show their love for one another by kissing, everyone loses their minds!
So to sum up:
violent deaths and straight people f*cking each other (I'm looking at you, GoT): A-okay for kids
Two people of the same gender kissing: Evil and obviously pushing some sort of agenda.