Well, I'm sure the US Jews here on FR are in 'rage', but have no need to feel swindled because they knew before the 2008 election what Obama's background was (e.g., his father and stepfather were Muslims and he spent two important years of his childhood attending a Muslim school in Indonesia), who his closest friends were (e.g., Rev. Wright, Rashid Khalidi, and Bill Ayers), and that some wealthy Arabs from the Gaza Strip (of all places) illegally contributed to his campaign.
If some Jewish Obamatons from 2008 feel "swindled," they can direct their rage at Dummycrat Jews like Robert Wexler and even Ed Koch, and other ringleaders of the phony Obama campaign sales team in the Jewish community back then.
Incidentally, I've never heard of "senior journalist" David Goldman, but his general assessment here is probably pretty much true.
You don’t want to get swindled? Keep your eyes and ears open. Don’t accept anything on face value without investigating, and beware of wishful thinking. Fool me once, shame on you. Fool me twice, shame on me.
I have white hot rage that supposedly savvy people, who weren’t born yesterday, take such a long time to figure out that they’ve been swindled. As for Obama, one thing he didn’t do was swindle me. I loathed him from the get-go, and voted for Sarah Palin and whatsisface.