The MP for Leeds North East, Fabian Hamilton, has called for action against the judge who suggested that one of the anti-Israel activists who was acquitted of damaging an arms factory should be awarded the George Cross.
Judge George Bathurst-Norman made the comments in his summing up of a trial last month.
Mr Hamilton, who said it is becoming increasingly difficult to defend Israel in parliament, wrote to the Attorney-General last week.
He said: "What makes this trial most disturbing is the way in which the judge used his summary to promote his own political views about Israel.
"What is to stop any group of pro-Palestinian or anti-Zionist protesters from attacking any business they deem to be supportive of the state of Israel?"