If Biden had been a Republican, the media would have went wild. They would still be going. But since he is a Democrat it was just brushed over and buried. But his remark does tell the Jews with ears to hear, what the political party they worship thinks of them as human beings. But, then again, Hillary Clinton did that a number of years ago but they still worship.
It's not a threat, just a statement from a known fool thinking he was supporting Israel. Most important as indicative of his mindset. Whether he'd support it or not, the idea that Jews could be forced to flee the US is real. A part of his America. A rather scary thing for a high ranking democratic politician to accept. I'm surprised it took months for it to come out. But it was said to Jewish donors, who probably take what he says with a grain of salt.