It is difficult. My dh is a practicing Catholic and I a Protestant Christian. The baptism in the Catholic church was a very emotionally charged debate for each of our children. The idea that if you don't baptise your child and they die, that they go to hell, is deeply engrained in the psychy of Catholics. His family were constantly on my dh's case for our firstborn to get baptised, I refused, and he conceded out of love for me. He took the job of shielding his families upset at it, from me. However when our secondborn came along, he had had so much grief from his parents, that I conceded to get the child baptised, but insisted that it be Church of England not Catholic, this was our compromise this time. We did the same with our third child.
Our firstborn chose to be baptised for themself at age 8, as they wanted to do first Holy communion with the rest of the class at school (Catholic school).
Our secondborn chose not to do first Holy Communion (was already baptised so did not need to do this), but now wants to be baptised in a Baptist church!!!!!
For what you are going through now with the friction, the child will have their own say in a few years time. My personal opinion in your situation, is that as he is non-practicing, then he has no right to demand you make your child a Catholic by baptising them in the Catholic church. He should accept a Church of England baptism as a compromise if he desperately wants them to be baptised as an infant, and should not force you to raise your child as a Catholic.
As an aside, there is a great film called "A Love Divided" that covers the issues of feeling forced to raise a child as a Catholic, and standing up against it!
Happygojo - regarding the Catholic church and the following the mothers faith, this is not quite correct, the Jewish faith follows down the mothers line, but at the reformation it was more, the boys follow the fathers faith and the girls the mothers. Of course whichever one was not the Catholic then that gender in the family was damned to hell, whilst the Catholic gender saved by baptism etc!!!!! (I found this out while researching "Interchurch marriage" for my thesis for my degree in theology!!!!)