I can understand a little of Ioane was upset after a frankly terrible attempt at a tackle by the other Harlequins player just before Marler bright him down, but if he thought that was Marler's fault then he was mistaken. Of course, Marler was just as poor in his decision making to take revenge and they both deserved the result.
I could see them handing down a bit of a paper ban to help recognize it was in the wrong but also that they'd pretty well handled things as adults between both players since but why is this the most ever fined for a racist remark? I'm sure there have been worse things (or at least things with more intent behind them) said on a rugby pitch and even caught on a referee's microphone but this gets the highest fine ever?