I think divorce should not be taken lightly but only as a last resort. Once divorce, there's no turning back and it's a pain for all members involved for a Long Long time to come.
I think that it is normal for parents to want to be protective over their child (some are over protective) and is totally normal to have the tendency of siding your own Mother as opposed to your mil.
I think you both have to talk about it and if need be consider family Counselling.
There could be a chance that your husband is suffering from post natal depression (yes men can have it too - causing stress and for some they turn violent). It also sounds like he has a trust issue or he is not on good terms with respect to your Mother (that's why he doesn't allow she to bring the baby out or use the products) - so the baby is just a manifestation of the underlying family dynamics
I think you guys should try to wok things out and see if you guys or he is able to seek help to curb his violence. Hopefully things can get worked out.
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