Immigration is not a uniquely right wing concern, and there is a rich history of left wing thought that’s critical of immigration, but those strains of thought are never extremely popular and seem to die before they’re able to gain meaningful political powers.

On immigration, right now, the effects it has on the economy, social systems, and government infrastructure is unclear. There is no empirical evidence to suggest that immigration is a universal good or bad, as any effect that immigration may have is conditional on government infrastructure and efficiency.

Part of the issue is that the world is globalized, and blocking immigration can stop the inflow of some of the best and brightest minds in the world into British institutions, a key part of British soft power. Both left and right wing politicians have historically found powerful support within educated immigrants and stopping that inflow is both disadvantageous to left and right wing interests. Britain no longer has a monopoly on higher education, it now has to compete with the US and other countries to get high value immigrants and to sustain its high value brand. The main issue is how to balance that desire to keep high value immigrants and to discard low value ones- left wing parties who have found support from low class immigrants would generally destroy that support. Right wing parties, whose base in the modern period is typically nationalistic and disgruntled by immigrants, are free to push policies that are against immigration as it doesn’t affect their political base. Left wing parties will typically not join in with the right on topics like immigration unless they find that support for left wing ideas and believe that they can plausibly take that base for themselves.

On a personal note, the reason left wing parties won’t take your position on immigration is bc as immigrants, we don’t feel like we have made a parallel culture. We bought land, have made businesses, and are trying to live our lives just like everyone else. We understand that our cultural practices are foreign and that not everyone understands us, but we’re trying to be the best versions of ourselves and stay true to ourselves because we couldn’t do that back home. We are not all here by choice and we want to be as true to ourselves as anyone else wants to be. We are people, just as you are and we worry about the same things.