It sounds like he is just taking a very immature approach to resolving all his feelings post break up. Some people can be very mature after and some people can't. He probably has some intense feelings about the relationship and he is showing this by being rude. Usually the opposite of love is indifference. When there is anger or animosity there is really pain. It is easier to feel angry than feel hurt. You are going to have to find a way to get along when he is ready. You may just be ready sooner than he is. Wait until he has resolved whatever feelings he has and then approach him about working as a team. You can't rush him. He has to be ready on his own. He has to work through his part of this scenario before you can be coparents. A lot of this issue for you is just waiting.
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