Jesus and the death penalty

Most Christians believe that Jesus Christ was not merely innocent, but was actually perfect. Yet he was tried and executed by the state.

I realize that a lot of Christians oppose the death penalty on principle. However, it seems like Christian opposition to the death penalty should be essentially universal, given that they believe the state can make such a colossal blunder that not only random innocent people -- but in fact the most innocent person of all -- might be wrongly put to death.

So today I'm going to try to guess what reasoning allows some Christians to support the death penalty despite their God's unfortunate experience with it:

* Those Romans were barbarians who didn't have the idea of giving people a fair trial or concepts like "presumed innocent until proven guilty," etc. We don't need to worry about such errors happening today.
* Jesus was executed for political reasons because there was an angry mob clamoring for his death. That's totally unlike the situation of any death-row inmates today.
* It was actually a good thing that Jesus was executed because he died for all our sins. Therefore the death penalty is good.
* The death penalty is part of God's plan. If He didn't want innocent people like Jesus and others getting executed by the state, He'd use His omnipotent powers to put a stop to it.
* Jesus's example clearly shows that even if innocent people are occasionally executed, it all gets sorted out correctly when they get to heaven.
* Jesus was executed for claiming to be king. Considering that He really did claim to be king (in a sense), the conviction was fair and just.
* Jesus was God. Things that happened to Him have absolutely no relation to things that happen to other people.

What do you think? Did I guess it, or is there some other explanation that I missed?