As with any issue balance is the key. Being anti immigration is wrong, but also letting in anyone without strong stipulations is wrong as well.
As a lefty, the problem with the left, and the reason they are losing this issue, is because they want to be so PC that they won’t even allow discussion on the issue for fear of not looking ultra progressive to their friends.
If you want to immigrate into a country, you must 100% be aligned with the values of your new country. You can’t come in and demand that people respect your religious views if they are anti women or anti homosexuals or anti trans.
To many of my progressive brothers and sisters seem to be ok tolerating intolerance. If your religion demands that your wife walks behind you pushing the stroller with a burka on in 40 degree weather, while you get to walk around in shorts and flip-flops we’re going to have a problem.