No, this definitely seems different and new from all the recent articles about it I’ve seen. This vote passed Wednesday, not in December. It’s a response to the protests at universities. And it’s a bill, so it can be passed into law. I think you’re confusing two different things.
This expands the definition of antisemitism to bring critical of Israel at all or comparing Zionism to Nazism, and would codify it into law if it, passes the Senate and is signed by the President. So there is still time to stop this, and it’s a big deal, so people should be angry about it.