It was "personal speech" revealing that he supports political assassination and murdering people. It would seem in the opinion of the business owner that goes to character rather than mere political ideology. Likely few businesses would want someone of such poor character working for them. "I support murder on my personal time so it should not affect whether you want to employ me" may prove to be a hard sell in court.
Maybe he was suffering from post-partum depression or psychosis. Or climate change.