Re: DH wants to convert. I dont understand...
I think you need to ask yourself why you would rather have him be nothing than Jewish. Judaism is an Abrahamic religion, and the majority of Christian-Jewish families find integrating both to be no big deal.
I also don't say this from a place of judgement. I'm a staunch atheist. If my DP converted to anything, it could easily be a deal breaker. I'm just curious as to what it is about Judaism that makes you uncomfortable. Most people in your position would be thankful that their husband found religion, and something so close to their own at that.