Ignore it -- the devil works by trying to provoke. If you ask the loons about what they themselves believe in, they either will not tell you (a clear sign in itself) or if they DO tell you the crazy stuff they believe in (like aliens made robots in the form of angels and that they believe Jesus was an alien spaceman etc.), they will be open for ridicule. But discussing their beliefs is off the table for them.
These are not Christians, they have no intention in Christians discussing. They are not worth your rile