From an non-commissioned officer:
For your first question …
As it says in Colossians 3:23-24, “Whatever you do, do your work as for the Lord rather than for men, knowing that from the Lord you will receive the reward of the inheritance It is the Lord Christ whom you serve.”
And your second one …
Quite true that we are to love our enemies; however, God did tell the Israelites to wipe out another culture (though at this moment I cannot recall who). Granted, the argument can be made that He did not call us to war, but then again no one knows the mind of the Lord. And we do not know what or how he has instructed our president.
Peace.