>Why are you complaining about leftists who see immigration as inherently "good" if you can't even explain why it's bad? If it's so obviously bad, surely you can outline what will tangibly happen?
This is just a bad faith misrepresentation of the context. Note the context of the OP is Swedish nationalism.
> You aren't "easily recognizing" anything, you are having a feeling about people different from you and trying to rationalize it afterwards.
It's not really that hard. Some traits off the top of my head: speaks English, values meritocracy and the rule of law, individualist over collectivist, ecumenical/egalitarian over sectarian, culturally Christian or downstream of it.
> If immigration was so obviously bad, do you think a nation of immigrants would be able to get to this point?
This point only makes sense if you assume immigrants are an undifferentiated lump. But of course this isn't true.