People are weirdly positive about immigration. Are you sure you want tenaceous immigrants if they are criminals and/or seek to change the culture that you and yours live by?

I suppose we should differentiaye between illegal and legal immigrants. I'd venture to guess that, on average self selection for intelligence manifests in the form of legal immigration, while the so called "tenaceous" immigrants tend to ignore legal borders.

Before anyone accuses me of white supremacy or privilege or such nonsense, my parents were first generation legal immigrants.