You know, that was my first thought as well. Few words outshine the f-bomb when it comes to expressing frustration. Some people find the f-bomb so very offensive that they simply can't hear the context in which it was used, and believe it not only taints every word around it for miles but also damns the utterer to hell. I'm so guilty of using it while driving, I'm no-one to judge; but there's a time and place for everything, and the consensus here if there can ever be one on FR is that it was an ill-advised thing to say in the brief format of Twitter.
I completely disagree. Ann Coulter showed herself to be an anti-Semite by more than simply using the F word. Her whole tweet was a regurgitation of the anti-Semitic idea that the only reason that Conservatives support Israel is to pander to the Jews. That she would get so angry about Cruz’s excellent closing argument where he mentioned that he would move the embassy to Jerusalem shows that she is no conservative.