John MacArthur mentioned several important things about what Jesus thought of the Old Testament in a recent sermon series. Here are some of them plus my own comments.

For one thing, He thought He wrote it (and I believe him). Christians have traditionally held these views:

Jesus is God as He claimed to be.
God inspired the Bible.
Therefore, Jesus inspired the Bible.
Interestingly, the references Jesus made to the Old Testament were often the most controversial parts and/or those characters that some liberal theologians think were fictional - Satan, Noah, Jonah, Sodom. When Jesus refers to them there isn’t even a hint that they weren’t real.

He didn’t appear to have any problem with the destruction of the world (except for Noah and his family) and He clearly taught that the majority of people will go to Hell. So we should dispense with the false dichotomy of the vengeful Old Testament God and the kinder, gentler New Testament God right here.