> It’s not, it’s only the far-left’s desire

Bernie Sanders (since you're presumably talking about the US) doesn't even support open immigration or H-1Bs, let alone open borders.

Bernie isn't the only member of the left and has positions that are a little idiosyncratic among that group; this is one area where he diverges.

Structurally speaking, being left and pro-open borders is incoherent. The left is about collective power controlling labor supply and using it to tamp down corporate overreach. Open borders and H1B that allow corporations to side-step local worker bargaining power are squarely antithetical to being Left.

I think 'liberal progressives' that are mainly concerned with identity representation, not working class power, are rhetorically bundled as 'far-left'. To people who buy that, Bernie Sanders (a Leftist) and Kamala Harris (a Third Way liberal progressive) are both far-left. It's incoherent but rhetorically potent.

Perfectly encapsulating how silly it is that so many posters in this thread are trying to make immigration policy a left vs right thing.

I think it's totally a left vs. right thing just like collective bargaining power is a left vs. right thing. An open border directly undermines worker collective bargaining and empowers business.

Sadly, you're getting downvoted for stating a plain fact.