True, but his death at such a healthy, young age is tragic, to say the least. I see he had medical treatment for almost a year and all it got was worse.
I imagine the cancer may have gotten better on its own:
Mar 5:24-26 NLT - Jesus went with him, and all the people followed, crowding around him. A woman in the crowd had suffered for twelve years with constant bleeding. She had suffered a great deal from many doctors, and over the years she had spent everything she had to pay them, but she had gotten no better. In fact, she had gotten worse.
Either way, Christianity doesnt promote honor killings, per se, but capital punishment is supported by many Christians for similar purposes, as well as having biblical support, primarily in the OT.
Additionally, God's first command given to the human race had capital punishment attached to it as a consequence: "Do this and you shall die."