Looking at the replay of the challenge a number of times it looks worse the more you look at it. He slides in, so he's not in control. He keeps his studs up going into the tackle. He was lucky that he didn't catch the Palace man square on the shin and the Palace man was lucky his foot wasn't planted otherwise that's a leg breaker. It's reckless and could have ended very badly. I don't think he meant any malice, but that's not the point. It was dangerous play.