> I don't know what you mean by "what's the argument"?

I'm asking "what is your argument?" What argument are you making?

> Policies and the impact (something that should hopefully inform a policy) are more nuanced than just "mass migration" "more migration" and so on.

Of course, and still we speak in shorthand all the time because regurgitating the complete nuance in every single Internet comment is untenable. If "left-wing folks generally support mass immigration" is inaccurate or incomplete, let's talk about that--what nuance am I overlooking?