I'm so sorry that this man is finally showing his true colours when you're in this predicament, however, he has told you who he is, and you would be well advised to listen.
The big question here is what do you want?
If you want to have this baby, and you have the means and emotional wherewithal to cope, then that is a completely valid and wonderful choice.
However, you do sound like you're not sure if you do want this baby. You have mentioned a fair few reasons not to go through with this pregnancy. But it also sounds from your posts as if you have linked this pregnancy with one you were forced to end by a man who was obviously abusive and that this man trying to do the same has triggered a deep emotional response from you that is clouding your vision.
Do you have a friend you trust who you can talk this through with? Someone you can talk through your feelings about your previous abortion and how this man trying to force you to do the same has made you feel? This forum is really good, but threads about this subject can become very emotive and weird and right now, you need someone to really listen to you not prescribe courses of action.
No one has the right to judge you on how many children you have or their parentage and anyone who would really isn't worth the effort of listening to. It's not their life, so it's not their problem.
One thing I really would recommend once things have calmed down is that you do the Freedom Program. It's not a cure all, but it can really help you to make happier choices about future relationships by pointing out the red flags that abusive men raise early on and how non-abusive men behave. Sorry I've not been much help, I hope you find the best path for you and your little family.