Re: Master and slave?
Your point is the English language is inadvertently and almost unavoidably offensive. That is true, but you make the mistake of conflating comedians highlighting this with politicians and civil servants who should know better.
I spent a couple of years struggling to write pro-peace event memos without using highly inappropriate militaristic language. I couldn't, it's everywhere. "Winning the battle", "Fight the Good Fight", "Strike a Blow" - our language is laden with our violent past.
I paid to see "Blazing Saddles" when it was first released, can't recall who I took to the cinema. I didn't, we didn't find it that funny, but I went to Mel's earlier and later movies. Now if you want a deliberately offensive movie then you should have chosen "The Producers", far more offensive and far funnier.
"Springtime for Hitler" is still an ear-worm for me.
I was at a communist poet bud's gig two years ago, and he gave the clenched fist salute. I replied with the Roman, well Nazi, salute. I didn't mean to, I'm an anarchist and we don't ever do salutes. I apologised and said I'd just wave in future.