Yep...definitely sounds like you've stepped on your husband's toes with regard to his "headship" privilege. Further, you've undermined repeatedly the absolute authority, especially by interrupting him, he should have as a JW man "lording over his home in a fine manner" (sarcasm). And, true to form, he's mimicking his beloved organization by acting in the same manner as the organization would if you question it or undermine it's absolute authority, by trying to punish you with scorn and silence for not being submissive enough and letting him\it win every debate and have the last word.
How childish......
I would agree with the other posters here that you should sit down with him and tell him what you expect in the relationship as far as demonstrating the respect you had for each other before his return to the JW fold, especially on the issue of differing opinions. Problem is, it will be very tough if not almost impossible for him to verbalize a respect for differing opinions especially if he's constantly being barraged by WT psychobable with it's incessantly veiled scornful lingo.
Perhaps he needs to be sat down with and reminded of why he married you in the first place, how he treated you, how he respected you, your opinions, your children, before his return to the organization. Aside from that, I urge you to be entirely "hands on" with your kids with regards to what they want to do with their lives and ensure that behind your back, they are not coerced into falling into lockstep JW just because it'll make him "look good" in the eyes of the organization.
The issues you're facing right now will in all likelihood will be the toughest challenges in your marriage if it survives should your husband continue to look toward acceptance within the JW organization.
Good Luck.