The sort of misspeak that Have I Got News For You won't find funny

'Let me put this message out to anyone: we are a party that's anti-racist and anti-Semitist… sorry… we're against anti-Semitism.' John Mcdonnell on the BBC the other morning.

John Redwood not knowing the words of the Welsh National Anthem, hysterical to HIGNFY and repeated over and over again. 

John Mcdonnell'a misspeak or verbal slip won't receive similar attention. 

I suppose it's safe to make fun of John Redwood but not so of John 'kneecaping' Mcdonnell?