Given the very negative baseline views that respondents have of immigrants, simply making them think about immigration in a randomized manner makes them support less redistribution, including actual donations to charities.
That is from research by Alesina, Miano, and Stantcheva. And don’t forget this:
We also experimentally show respondents information about the true i) number, ii) origin, and iii) “hard work” of immigrants in their country. On its own, information on the “hard work” of immigrants generates more support for redistribution. However, if people are also prompted to think in detail about immigrants’ characteristics, then none of these favorable information treatments manages to counteract their negative priors that generate lower support for redistribution.