The Bible, including the New Testament, tells us that God used Godly men and women at times to put down their enemies. Gideon was one such reluctant person who God had to convince to pick up the sword against his enemies (Judges 6-8). The New Testament Book of Hebrews text is given as an example of faith in action (Hebrews 11:32-34).
God is not a pacifist. The gospel story of Jesus going to the cross shows only a portion of God's nature. We cannot reject the nature of God portrayed in the Tenach (Old Testament) because the Bible clearly teaches that God does not change (Malachi 3:6, Heb. 13:8). The Christ revealed in the Book of Revelation is one of a warrior (Rev. 19:11).
If I am being robbed at gun point and I call 9/11 I pray that when the cops show up they are not pacifist Christians who refuse to carry a weapon. Apostle Paul wrote that governing authorities do not carry the sword (gun in our day) for nothing (Romans 13:3-4). If all police and soldiers who become Christians give up their weapons that would leave a great void for ruthless ungodly men to fill and surely we do not want that. If it not been for Roman soldiers with swords Apostle Paul would have been killed by the Jews. Thank God! (Acts 23:14-31)
The man who stands by while his family is molested
is nothing more than a coward.
Some ancient advice. Liberty needs our protection.