Those words are doing some heavy lifting. The EU cares more about their commitment to democracy, and their dubious economic policies. The last thing the EU needs is another Hungary.
My instinct is that there are a lot of a potentially good reasons not to let them into the EU, and maybe even ones for kicking them out of NATO, but "they want to sell their minerals to other countries" doesn't strike me as a reasonable gripe in terms of NATO at least.