He's turning into a Suarez where his quality is being shadowed by his gamesmanship.
MW
In this case it was a dive, but I think at least two of his other yellows have been for fouls on him, IE they weren't dives. His reputation is starting to turn against him mostly from poor decisions. Difference is Suarez cheats all game long every game, he never once has kept quite and not harrassed the referee over almost every decision every single game since he joined. He's also dived almost every game since he joined, as always everything is measured in degree's, is someone who dives once as bad as someone who dives every game, are two players as bad as each other if they both dive 5 times a season, but one is a mouthy git who also tries to injure players throughout the season, complains about every decision and is a genuine grade A **** on the pitch every second, when the other guy does 5 dives and nothing else at all?
Suarez is the most prolific diver, the most prolific complainer, he consistently attempts to injure players and aside from just diving he also tries to create fouls more than any other player. You know the running up to a player grabbing his shirt, diving and pulling the player down on top of you trying to make it look like a foul. He is the most "complete" cheat the premier league has. Even if Bale was guilty of all the dives he's been carded for(he isn't, some though were dives), he still isn't everything else that Suarez is.
Suarez made Suarez a target not poor refereeing(good ref's would send him off almost every single game for dissent alone, let alone his intentional injury attempting fouls), Bale has been the victim of poor ref's as much as his own dives(50/50 probably).