I don't think any of this is counter to what Greenwald, I or a great many moderate voices would contend about immigration in the modern world. If pointing out that immigration has tradeoffs and requires some degree of organisation and solidarity among workers was not bigoted when Marx and other early communists said it, it is not bigoted to say similar things today.

If positions are rooted in hatred based on race or class, of course that's different, but Greenwald has said nothing of the sort, and all the positions he's expressed in the past 15 years make it clear he doesn't think anything like that.