Counterpunch publishes several other anti-semites like Allison Weir and Franklin Lamb. It's a crap website.
Shamir (or whatever his real name is) is not Jewish, he converted to Greek Orthodox Christianity.
Holocaust denier in charge of handling Moscow cables
https://www.theguardian.com/media/2011/jan/31/wikileaks-holocaust-denier-handled-moscow-cables
Israel Shamir: Wolf in Sheep’s Clothing
By Roland Rance
http://www.socialistviewpoint.org/sept_04/sept_04_22.html
His Jewish Problem
Israel Shamir is a slippery Holocaust-doubter whose anti-Semitic, anti-Israel views are—in the age of WikiLeaks—finding a new audience. Part 1 of 2.
http://www.tabletmag.com/jewish-news-and-politics/67305/his-jewish-problem