That’s a WRONG NUMBER for the number of Jews in America. It’s almost 7 million in the USA. You should probably correct that title line!
The figure for the number of Muslims is about right, though.
I’d also always thought there were about as many Jews in America as in Israel. I looked it up and at the most conservative figure I could find, there are 5.3 m Jews here and 6.1 m in Israel.
The 2.3 million is the Guardian’s mistake, not the poster’s. And I have no idea where the Guardian got that number, and neither do they. Such is the state of journalism these days.