I am a native; it’s a very multicultural island, but I have never seen an American coming here.

It would be a Gish gallop if they do some brigading; that’s how they usually scare off OP. Since he did not know he was making a controversial statement, and did not pre-emptively stop the Gish Gallop.

ad nauseum

Thanks, this is an exact description.

Unfortunately, it is a split issue, so both sides get some support.