I apologise to all of the people on this forum upfront as what I am about to say you will not like, nor want to hear.
There is NO unconditional love.
None.
Not even God gives that, because he has clear and concise limits to what he will love.
No human loves unconditionally, even of their children.
No animal loves unconditionally either.
There is always a limit somewhere in love. It may take a long time to present itself, but it is there.
We have to be honest with ourselves, that if we look we will find that we all set conditions. Some more lenient than others.
I used to agree with your premise. I used to say and believe that I was incapable of unconditional love. Used to. Up to a couple days ago, when I realized: I have loved unconditionally. While this is not a guarantee I can do it in the future, I have a history I can look back on that I am capable of unconditional love.
(I'm going to whisper this to you only -- you alone. So don't tell anyone. Okay?) When my husband and I became engaged, I was so blatantly honest with him. I wanted him to have no surprises. I thought he did the same thing, but he didn't. He had a lot of very bad secrets that, if I had known, I would not have married him. No way, mister. No stinkin' way. Further, I could not get along with his son. At ALL!
This was my second marriage, and I had two children from my first. When my daughter was in her mid-teens, she was led by a church family to do things she should not have done. Very bad stuff.
Here's what happened:
As the truth came out, developing over @ 10 years -- correction: over more like 18 years -- , I stayed with my husband. I hated him with my whole heart for a couple years, but I had learned that love is an action, so through that time I acted out love but felt none. Meanwhile, in the early years, there was my daughter. In spite of her actions and attitude, I just loved her. Her occasional verbal abuse of me did not change that one bit. Her horrible actions did not change that. I loved that girl. My husband's son? I tried to learn to love him, but all I could muster was a love-in-action thang. My son and his daughter? They were easy to love.
Here's what developed:
My daughter realized she was acting outside of her own wishes, doing what she did not want to do, and she repented. Love won out.
My husband's son grew up. Love won out.
My husband? I put up with, put up with, put up with, but I stayed and served. Then I gave him my final ultimatum. Straighten it all up, admit it ALL, repent, because you have used up all your chances, and I am through. I am not ghoing to put up sith any more. Period. He heard me. Was that love? Yes, it certainly was, because I knew he would understand the deal and start living right if I stood my ground. I wanted him to live right before G-d, and I would not coddle him anymore.
Here's where they are today:
My daughter is a beautiful believing mother, wife, and worker who could not be better.
My husband's son is a father, husband, and worker who is developing well, especially over the last year.
My husband, as I told him last night, is all of the man I thought I was marrying over 27 years ago. I can hold my head up and love him with everything that I am now.
My son? He's just traveling along, making me happy with the father, husband, son and worker that he is.
My husband's daughter? Well, there's a problem there. We don't see her but I never quit loving her.
Now. Let me write something about G-d. You are wrong about Him. He provided every opportunity for people to be saved, and He accepts our pitiful little efforts toward Him as though we have done great exploits. How? By His Son. Do you think I would give my son for you? NO STINKIN' WAY! I don't have that kind of love for you, but G-d has proven His love for you that He already did it. That is unconditional love, because He completely provided everything for salvation before the foundation of the earth. If we reject that, we're just stupid. Period.