Re: Smuggle him out in the Diplomatic Bag
It has to contain articles for official use, specifically documentation written for the purpose of the diplomatic mission. I don't think he comes under that.
Though it's a "nice idea", in that you could in theory use a shipping container as a diplomatic bag and hope they recognise it as such, it doesn't give you rights to just put anything you like in there - and it's been tried (and failed) in the past. Everything from space shuttle components to heroine to bombs.
And the knock-on diplomatic effects even if successful could cost them billions in trade, just for a prat they don't want any more.