YANBU. A man is quite entitled to want his mother on holiday, (and so is a woman; she is entitled to want her mother along too.) However, if the wife/husband does not agree, then it can't happen. I got OK with my MIL when she was alive, but would never, in a million years, have wanted her on holiday with us. I can't even explain why. She was pleasant enough, and liked me (I think!) but when I was with her, I was never really properly relaxed, and felt I had to smile and chat and listen to her all the time, and I always felt I had to be on my best behaviour iyswim. FWIW, I wouldn't have wanted my mother on holiday with us either.
When DH's father died, his mother was alone, although she only lived 2 miles from us, and she wanted to come and live with us!
DH tried to convince me several times that it would be a good idea and she could take care of the kids etc, but I said 'I am quite capable of taking care of the kids myself thanks, and there isn't the room etc,' and he said 'she can do the housework etc,.' Again, I told him I can do the housework mySELF. She even said to him 'I don't mind sleeping on the couch, and I will be quiet; you won't even know I'm there.'
But I just couldn't. Again, FWIW, I couldn't have my mother living with us either.
I have no idea why his mother wanted to come and live with us, because she wasn't even that old (late 50's,) had friends nearby, and a job, and me and DH and his brother (and brother's family,) and other extended family visited at least once a week. So she rarely went a couple of days without a visitor.
Thankfully, she stopped asking after a few months, and never held it against us (as far as I know.) I think she just felt like she didn't want to be alone after DH's dad died, and that is understandable, but I just couldn't have her living with us.
And like a few people said above, I couldn't give a shit what other cultures do; we are not all the same, and what works for one culture, doesn't (necessarily) work for another. In some cultures, you are expected to marry someone you have never met, and that works for some.. However, would you people who think we should be the same with our elderly as other cultures are, be OK with being expected to marry someone you have never met before? Probably when you were about 18?!
No, thought not.
As for your DH not speaking to you because he is not getting his way. That is utterly pathetic.