Comment by mothballed

I don't have any data to back this up, but it is conceivable the people that want to deport en masse often understand that the perception of such policy is ugly, and simultaneously support it while not wanting to publicly broadcast it.

If I supported mass deportations, I would simply vote for it and never tell anyone so that I could get what I want without getting any of the flack from the associates of the people who are deported. There's not a lot to gain from telling others you want to harm a bunch of your neighbors, but there is a lot to gain if you can give them the boot and not being perceived as having anything to do with their misfortune.