It's not their religion at all, their countries just don't have rules that stop it, just like China doesn't to stop this, it's not nice but there's worse things happening.
It's not about being emotionally blackmailed, but your wealth, Britain's wealth, was funded by slavery. Whether you like it or not your living off the fruits of that labour.
So while we continue to live off that trade then we are not in a position to criticise anyone really