Why isn't there a straightforward answer? Why is it so convoluted?
If you know about the political situation in America you would know why it is ironic that someone would invoke ancestry-based citizenship rights to leave America out of protest of the current president.
It makes perfect sense to me.
You haven't explained anything, you just keep repeating a vague premise and saying if someone doesn't agree they 'must not understand'.
It's not ironic. It's just the only way out if things get really bad.