Op - your DH is being very childish and petulant, if you can't discuss this with him, then you need to do what suits you.
We had always alternated my DM and PILs, with DM going to DB and PILs going to SIL when not on 'our' year.
Unfortunately we had a big fall out with my mum and Brother 2 yrs ago, going NC for a while, including xmas when she should have been with us. However, she was confirmed as having terminal secondary cancer early in 2015, which meant our differences had to be put aside so we could help look after her.
Fast forward to last autumn. It was obvious that last xmas would be DM's last, and that we had to spend it with her, despite it being my PIL's year to come to us, having not spent the previous year with her.
Fortunately PIL and DH are v understanding, we spoke briefly together about the situation and then he spoke to them. They understood and we arranged for them to come to us 27th onwards, for a second xmas celebration, plus we took them to Panto. Mum died 6 weeks later.
This year it will just be the 4 of us, as PIL will go to SIL as per original rota. We will see them afterwards again.
It does mean we haven't spent an actual xmas day with PIL for 3yrs, but neither they nor my DH put a massive emphasis on that, as long as we spend some time with them, they are happy.
DC are older, 18 & 16 - whilst they weren't thrilled to spend xmas day in mum's tiny bungalow last year, staying in a nearby Travelodge whilst DH and stayed in her 2nd bedroom, they understood and accepted it. On xmas day this year, at least we can look back and know we made mum's last Christmas as lovely as possible by being with her.
I think you have to go with your feelings, and ignore your petulant husband. If he cannot understand why you want to go to your parents, he needs to grow up.
Whilst I can understand his thoughts on his mum maybe becoming ill, as it is similar with my PIL, you can only support the parent who is sick at the time. My PIL are much younger than my mum was & still in v good health so God willing they (& us) will still be around to spend a full Christmas together next year.