Isn't the Labour Party (e.g. Corbyn) missing this simple slam dunk counter-argument regarding 'Labour and anti-Semitism'?
Leaders and countries are routinely compared to the Nazis, e.g. Saddam and his Baath Party, the Saudi regime, Iran and Ahmadinejad, Hamas, Trump and America, the Tories, Gaddafi, Putin, ... .
The comparison is often invalid or stupid. But the whole point of a free-speech society is that people must be allowed to say anything, no matter how seemingly ridiculous.
So it makes no sense to single Israel out (in UK political debate) as the *one* nation that cannot be compared to the Nazis.