Thing is, those who are against immigration are much more motivated. This is generally how politics goes, that a motivated minority can eventually get their way against a less-interested majority. As great as it is, that was largely what happened in the other direction with issues such as gay marriage.
For those who are anti-immigration this is often the only topic they care about, or they care much more about this than anything else. On the other hand, those who are pro-immigration are largely either mildly-favorable towards it or they care much more about other issues.
Personally I think that left-leaning parties in Europe basically have two options currently:
-Fight against anti-immigration stances and then lose power.
-Focus on other topics while getting tougher on immigration.
It might not be the smartest move to be anti-immigration, but unfortunately in a democracy feelings are usually more important than facts and one of the biggest issues with the left is not being able to accept that.----
I hope you had history lessons in school. Europe and the West are jointly responsible for the conditions in Africa and the Orient. My goodness, that’s not even history, It’s happening right now.