I don't know where you found the link -- I don't know anything about the writer of  the piece either. But, you have really stretched a tortured sentence beyond even that sentence's bizzare connection.

Here's what it says:

"The next day, the Jewish Federation of Greater Washington, the Jewish Community Relations Council of Greater Washington, the National Jewish Democratic Council, the Republic Jewish Coalition, the American Jewish Committee and the Israel Project sponsored a rally with Hagee near the White House, according to the JTA. Sen. Sam Brownback (R-Kan.), Maryland Gov. Robert Ehrlich, Rep. Ben Cardin (D-Md.), Rep. Robert Wexler (D-Fla.), Rep. Brad Sherman (D-Calif.), and Rep. Debbie Wasserman Schultz (D-Fla.) spoke at the rally."

So, all those groups sponsored a rally, and this CUIF and Hagee horned in on the action, along with who knows how many other 'sponsors' and speakers.  And all these other politicians also spoke. And somehow, Cardin is making common cause with the three guys you single out for mention. Why not say he's making common cause with Bob Wexler, or Debbie Wasserman Schultz? Because Dems like these two. But, I guess by your reasoning, we shouldn't.

I'm not even clear whether this Hagee is a sponsor, or a speaker -- all I get is it was a rally "with" him. Heck, maybe he was just in the crowd. Do you take that seriously? Do you think these politicians demand to know who is being considered a  sponsor, or who else will speak? And that they will refuse to speak if they find someone on the list who might be objectionable, if they knew anything about him?

Common cause? Are there any sane people on this site?