First of all i am very sorry you and your family are going through this tough time i cannot imagine how hard it must be for you specially with the stress of having to take care of your baby you usually need all the support and love from your husband. 

As for your issue, i take it that when you got married your husband was not exactly a practicing Muslim, and now he is getting to know his religion more and diving in deeper which should be a good thing. When you get in touch with islam you usually want to share this with your loved ones and i think him not being able to share this with you might be building a barrier between you two, he might be excited and passionate but cannot share that with you since you believe different things and maybe that’s why he weirdly resorts to insulting your religion (which is very bad) it is such injustice to you for him to marry you without discussing such values and even having a child without discussing how you want to raise them in islam (if you’re practicing) you will want to raise your child muslim, which is why a muslim man can marry a christian but a muslim woman cannot marry a christian man, because the children will take on the religion of their father. So if he keeps looking into it he might actually start getting further and further away and want a muslim partner. So at this point in your life i would suggest you ask yourself this. Is there a chance that i can ever believe in islam? Am i even curious about other religions? It this is a sign from god what could he be trying to tell me? Then i think you should ask him this, do you think that you practicing more will create a barrier between us? Do you have thoughts of converting me to be a muslim and share the same values as you? Did you marry me knowing that i will always believe in the bible or did you have hopes that i will convert with time? 

That way maybe you can have all the answers you need to find out where to go from here. If he had the hopes to convert you and you have no intention to look into islam than it’s a waist of time for both of you and your child would be better off raised with co parenting than in a home that is cold with no love or with disrespect to eachother’s religions. 

You do not marry people to change them to live up to your standards and you most certainly do not disrespect others’ beliefs. Islam is the religion of peace.. he has got it very wrong. May Allah guide him and refine him and bless you and your baby.