Jesus is not the son of David. He is the root and offspring of David. They THOUGHT He was the Son of David, ie Solomon's reincarnation.
Read Matthew 22:45 and Luke 20:44
You're misunderstanding the scripture, and the kingdom of heaven is not the same as the kingdom of God. Heaven is subject to violence remember!. Little hint, when God created the heavens and the earth, it doesn't mean what you think it means.
Among those born to women there is none greater than John, but even the LEAST in the kingdom of God is greater than he.