Balthazzar
N. Germanic Descent
I define enemy as one who intends you harm (malicious) or is indifferent to harming you (sociopathic), and love as the act of protecting, sharing resources, or otherwise promoting the well-being of another. Using those understandings, the answer is no. Enemies need to be avoided, not supported. The most I do for an enemy is to not retaliate unnecessarily, and I don't really do that for the enemy. I do that for myself.
I'd like to expand on this a bit:
Another poster mentioned turning the other cheek, which is another piece of scriptural advice I consider bad advice. It invites further violence.
And another scripture calls meekness blessed. Meekness is a poverty of spirit and an unwillingness to assert oneself when he should be showing some courage, confidence or fortitude.
In each of these cases, the believer must redefine words to make any of these make sense. Turning the other cheek becomes forgiving and meekness becomes humility.
Do you see a common thread running through them all? This is advice one gives to people he intends to exploit in order to have them stand down and accept it. This is what an enemy tells you to do and be. This is what the Sermon on the Mount was about. Be longsuffering the exploited are told, for your reward will be great and will come later, but not if you rise up. The appeal of such a religion to a person like Constantine becomes immediately apparent.
Christianity describes itself as a religion of love, but I see it as a religion of submission. It describes its god as loving, just, and merciful, but in the end, you obey its commandments or burn. There is no love, justice, or mercy in that - just authoritarianism and severe punishment incommensurate with any alleged sin and with no hope of appeal or parole.
This has been my struggle and for many years. I have gone so far as to call it teaching victim mentality as an honorable thing and by doing so, teaching predators that creating victims is not only warranted but rewarding for the victims. The only way I could ever stay true to turning the cheek was to acknowledge a need for temperance and self-control, while building up a beast inside myself. I don't have a victim mentality. At this point, I'm the predator, even if unable to win the fight on my own. It's the duration and endurance, the illumination in the effort to remain peaceful and the understanding the just nature behind an honest stand against an enemy.
Hebrews 12 sheds a little light on the practice itself and the training involved.