So, should a Jewish employer be required to hire a Nazi? Could they say - sorry, we don't do business with Nazis?
The employer should be prohibited from asking the applicant about political status in the first place, and therefore your question is moot.
That is what you don't seem to be understanding. Political views have no business being in in the office in the first place. If you bring your political views into the office then that fact alone can be cause to terminate you, or to end consideration for an open position.