Sentence:  There is a certain irony in all of this because in their <WSD>hysterical</WSD> use of charge of “double standard” – that Israel is being “singled out for criticism”– it is Israel's supporters who are themselves guilty of a “double standard”, since, if they were to have their way, it is Israel that would be singled out as the only country that cannot be criticised. 
Meaning of the word marked with <WSD> tags:  Provoking uncontrollable laughter.