Amazingly, I made this several years ago

Is this a happy face or a sad face?

So, whenever I talk about immigration on that Bird Website, I get people saying with open immigration you'll get more fentanyl "pouring across the borders." I don't actually understand what the specific claim is there. Like, being most generous... do they mean increasing legal immigration would make drug smuggling easier? That people south of the border are more into drugs and will bring that culture? Like, what's the particular notion they're scared of?