That is definitely an "it".
Gollum is gender binary, and prefers the pronoun "he". Tolkien was very traditional
If they made the illegal "immigrants" pay Social Security, income tax, and only live in fire dept. approved houses with a c-of-o for the number of people living in them, I would put up a sign on every border welcoming them. The U.S. can only stay rich and powerful by growing, and immigration helps us grow. The US was always strongest during or right after times of mass immigration. We have only .32 billion people, and are trying to compete with China, with 1.4 billion, we need growth, and immigrants are usually more ambitious than native born Americans, and open up management positions for people who were here longer.
I know why people are angry, my father had a home improvement business for a while, and almost lost the house because of it. He had to take, say $25/hr, for himself and each of his workers, because of tax, and the fact that you need to pay rent etc., but the illegals could take $10 and make the same money, because they don't pay tax or insurance, and live in cheaper, illegal housing that then creates a threat to the firemen who volunteer to protect all of our lives.