

That this happened around April Fools’ makes me think that someone forgot to instruct it not to partake in any activities associated with that date. The fact it chose The Simpsons’ address in its (feigned?) confusion is a dead giveaway (to me) that it was trying to be funny.
Or rather, imitating people being funny without any understanding of how to do that properly.
Its explanation afterwards reads like a poor imitation of someone pretending to not know that there was a joke going on.
Well, once you’ve had your country invaded by rabid psychopaths, there’s bound to be some gene admixture (to put that far too mildly) and so you’ve a chance that their descendents, even if it’s recessive and rare, will have the desire go on to do the same.
Of course, rabid psychopathy and the urge to invade other places can also come about on its own, but when you look at the way the Vikings and their Germanic cousins invaded western Europe a thousand years or so ago, and then note what happened a few hundred years later, it has to make you wonder whether it might have only happened the once.