Are you kidding? It's an accusation of being a Nazi. As you say, cruel, dogmatic, authoritarian.
Someone who is 90 knows exactly what they are saying. BUT, they may also be used to using more robust, prejudicial language in everyday parlance than would now be acceptable.
A similar but ostensibly complimentary phrase would be 'well, you know how to make the trains run on time.' A reference to Mussolini's Nazi regime.
Does he want you to organise this thing or not?
Really, this just sounds like another privileged, cosseted bloke who thinks that parties 'just happen' because women somehow magic them up. Who has never before had to play any role in their organisation.
I think you need to have a conversation with him, where you say that you're happy to organise and host this party but there are a lot of choices to make and you're keen to make sure he gets the party he wants, so would welcome his input to those choices.
Also tell him bluntly that organising this thing will take a lot of your time, you're happy to do it but you do not appreciate being rewarded with insults. I would say I was offended by the jackboots reference and wanted an apology. Up to you if you do that.