You don't indicate a political slant, but this is an alt-right take on American politics if I've ever seen one. I would counter with:

For a couple hundred years, Americans insisted 2+2=5. It was even enshrined in law for the first hundred or so years. We eventually agreed on a compromise, 2+2=4.5, but some of our lives depend on the answer to this math problem, so we're not going to stop fighting for 2+2=4. Sure enough, if you work as an engineer, you're going to be fired if your answer isn't within tolerance.