When I read Evans' letter, I went back to re-read Rabinowitz's column. I too was struck by her dig about the "Nazi" support.
So I did a bit of digging and came up with a very interesting piece (Malmedy and McCarthy) by a contemporary, in 1954. It's at:
http://www.fredautley.com/malmedy.htm
It gives a good insight into Military Tribunals, which makes it especially appropriate today.
It also gives a hint as to why it was important to Rabinowitz.
McCarthy was on a sub-committee investigating charges that the investigators and prosecutors had used physical and mental torture on the accused German Army folks charged with the Malmedy Massacre. McCarthy walked out on the sub-committee claiming that it was a white-wash, and he said so on the floor of the Senate.
Most, if not all of the investigators and prosecutors were Jewish.