[Boogieman]

Yes, even then.

“But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;”

[HarleyD]

You forgot the part that by doing so you will heap burning coals upon their heads. And, yes, that is heaping coals.

It's no different than what God does for men. How He loves them, blesses us, does good for those of us who hate Him. Yet, in due time their foot shall slip.