I had a discussion last week on this topic. My conclusion on it is (I have no proof of this, it is merrily my opinion) unconditional love was first introduced by the church as a way to control the masses. Or better said, to keep the masses from killing each other (and ultimately the clergy), rendering their exploitation and subjugation impossible. Love thy neighbor as Thy self (this statement is flawed as a stand alone statement, but it works for it's intended purpose here), judge not for you shall be judged (the ever present state of coercion-if you can't love unconditionally then you will go to hell if you don't). This philosophy keeps the masses in a state of constant self deprecating and false humility, throwing a cloak of forgiveness over all. This in turn enables the sociopaths and allows them the freedom to work there evil deeds. This is seen through out the ranks in a church, but the worst of them all will be at the top. Unconditional love is irrational and evil in my opinion. I agree with Ayn Rand and Hannibal's take.
Love is not to be thought of as a ransom if not seen as unconditional. It is an involuntary response....
If there is no virtue one can not force an involuntary response.... To try would be unethical, false and ultimately self destructive.
Love is one of the most beautiful experiences in life and it is no wonder that it would be corrupted for the use of evil.
Hold true to virtue. Love has no choice but to follow.