Matthew 15:14 showed that Jesus promoted the Mosaic law that disrespectful children should be executed: "God commanded, saying, Honour thy father and mother: and, He that curseth father or mother, let him die the death."
Although it's not Jesus, Paul goes on a tear in 1 Romans 1:32 screaming about "backbiters, haters of God, despiteful, proud, boasters, inventors of evil things, disobedient to parents," and so on. He ended it saying "Who knowing the judgment of God, that they which commit such things are worthy of death, not only do the same, but have pleasure in them that do them." Not only these people but people who support them should be killed.
And of course Jesus's description of the end of the world with plagues, earthquakes and so on involved plenty of death.
Well , talking about death that will surely happen, and promoting death are two different things. For instance, I believe three quarters of population will perish very soon. But I wouldn't like that to happen, not to people i know, not to people i don't know. So just the facts that Jesus talked about that, the fact that He explained the Judgment and the Law, doesn't mean the He wants people to die by the Law.