Part 2

Deuteronomy 7:2
New International Version (NIV)
And when the LORD your God has delivered them over to you and you have defeated them, then you must destroy them totally. Make no treaty with them, and show them no mercy.

Is God against fighting? God just told Israel to have no mercy and kill all the nations that oppose them. God told them to fight. He wanted to secure His people. He was being a good steward of His chosen people. Protecting them. Shouldn't we do likewise?

John 2:21
But the temple He had spoken of was His body.

This verse was after He told the pharisees "Tear down this temple and in three days I will build it again." Our bodies are the temples of God! We should take care of each other! Protect each other and ourselves.
That is one of the reasons that martial arts are beneficial.