Isaiah 2:4
And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more
The time will come.
Yes.
In the meantime, Romans 12
"Do not repay anyone evil for evil....Do not take revenge, my dear friends, but leave room for God’s wrath, for it is written: “It is mine to avenge; I will repay,” says the Lord. On the contrary:
“If your enemy is hungry, feed him;
if he is thirsty, give him something to drink.
In doing this, you will heap burning coals on his head.”
Do not be overcome by evil, but overcome evil with good....
13:12 The night is nearly over; the day is almost here. So let us put aside the deeds of darkness and put on the armor of light.