It's really bizarre that you think this. Sexual preference still isn't a federally protected category. Neither is political affiliation. You're protected from the government arresting you for the views you express, but unless you have a separate contract or more protective local laws, a U.S. employer can fire you for being a Democrat or Republican.
You're trying to apply current law to mere predictions of what the law might be in the future. He's saying that for example political affiliation might become a protected category. Nothing bizarre about it.
https://www.nolo.com/legal-encyclopedia/can-employers-discri...