I can see both sides. Yes the Pope is head of a State, but it's a State like no other in the world. What is its population? What does it produce? What i its political and social structure like? It bears no resemblance to any other State or country in the world, it is just a very wealthy and well-run self-promoted organization.
The issue may be that the cost of protecting The Pope may be considerably higher, than, say, the King of Sweden (do they even have a King, anymore? I don't know) but you get my point.
I've never been a very political animal, but as I get older, my niaivety becomes more of a problem. I find the idea of politicians spending money that I have no choice about handing over, to pay for things I don't want to buy, increasingly annoying.
This is just one of many.
S