Kind of like God and the 10 commandments? When he tells Moses, Thou shall not kill...............Now go on up north and kill every one you see and take there land.
Nobody can live to the letter of the law which is the 10 Commandments. That is why Jesus came and died/rose again for all so we are not bound by the law which nobody can follow. If you break one commandment you broke them all. We are all guilty of that.
In regards to your quote above there is a time for everything...
From the Bible, Ecclesiastes III (King James Version):
3:1 To every thing there is a season, and a time to every purpose under the heaven:
3:2 A time to be born, and a time to die; a time to plant, and a time to pluck up that which is planted;
3:3 A time to kill, and a time to heal; a time to break down, and a time to build up;
3:4 A time to weep, and a time to laugh; a time to mourn, and a time to dance;
3:5 A time to cast away stones, and a time to gather stones together; a time to embrace, and a time to refrain from embracing;
3:6 A time to get, and a time to lose; a time to keep, and a time to cast away;
3:7 A time to rend, and a time to sew; a time to keep silence, and a time to speak;
3:8 A time to love, and a time to hate; a time of war, and a time of peace.
As you all know I am not a Bible Thumper........ Food for thought is all.