Some of them are thugs, to describe them all as such is silly, especially as Levante, in particular Juanfran is by far the worst offender on the pitch.
Likewise Di Maria isn't a thug, just an immense cheat, can't stand that little git, but then there was zero contact between him and Juanfran who went down like he'd had his leg broken to start the thing, two wrongs don't make a right, but the guy to start it was unquestionably Juanfran, if ref's had any balls he'd have red carded Di Maria and Juanfran for unsportsmen like conduct and got on with the game.
Levante since the first minute have been throwing themselves to the floor, too knackered to watch the second half, first half was a pathetic show of cheating.
I'm honestly not sure I'd risk bringing Ronaldo on with a slight ankle problem, or without, because Levante will target him no question, Diarra getting a red card from players diving is a fairly risky prospect aswell. They need Ozil on(and Ronaldo really, but he's too much of a risk to be injured) Di Maria/Kaka just aren't creating/controlling the game like Ozil/Ronaldo can.