I, in fact, don't know anyone that supports Hamas since i only have contact with my Jewish community, but if i ever made contact with someone who supports Palestine/Hamas, how could i convince them that it is wrong?

What should be the best to do if I am surrounded be people who are not Jewish, they are insulting me and telling me horrible thing about Israel and Jewish people. What should I do in that situation, defend myself, my people and my country or just ignore them?