if you do care, ask around. ask how other people in your life feel about immigrants. ask about immigration reform. ask about how one could become a full-fledged citizen in your country, and what percentage of immigrants are completely barred from that.
you will be surprised (for the negative) how many "socially liberal" and "left-leaning" folks really don't care about immigrants at all. at least the right is explicit about its hatred for immigrants.