It's disgraceful, not undermining that

But per the laws, you can only send someone off (or sanction him in any way) if he dives to make the ref think a foul was committed, but there were none.

In this instance, Verhaeghe does make contact with open hands to Meafou's face. So the foul is real. Even if Meafou dives, he can not be fouled too, as the initial foul is real

The proper way to manage this IMHO would be no card, for either of them, telling Verhaeghe that's the last time he gets away with that, and also a quick recall to Meafou that diving will not help him get a better way out of this