I think the "controversy" comes from Mexicans. Because Mexico is theoretically a "socialist" country, they don't like to admit that they have people worth 1.5 billion. Kind of takes off that socialist luster. But of course, socialism is simply another name for oligarchy (in socialism, the rich always rule, there are just fewer of them than there are in capitalism), so this should be a surprise to no one.
What does that have to do with the marriage? Where's the controversy?
"con·tro·ver·sy (noun)[kontra vursee]
dispute about contentious subject; disagreement on a contentious topic, strongly felt or expressed by all those concerned"
Onlt Malkin finds some controversy in these two people marrying.
I understand the drug connections, but I don't get why she'd consider a marriage to be controversial.