It turns out those polled are not good at knowing verifiable facts like:

What share of U.S. immigrants receive unemployment? What share of U.S. immigrants are Muslim?

Why do people even hazard a guess at this stuff? Does your average Joe registered voter really think they have such a handle on immigration in their country that they think they know the religion of everyone coming in and who is receiving exactly what benefits?

Talk about the Dunning–Kruger effect...