It has been deeply amusing, this week, to see companies twist themselves into knots to explain why they pulled ads from TLC’s “All-American Muslim, the network’s most benign show in years. Perhaps TLC executives understood, from the start, that the most heated drama around this show would have to come from outside. If companies aren’t going to stand up against bigotry - if Muslim celebrities and sports stars are largely silent in situations like this - then our best bet for advancing knowledge might be reality TV.