I agree, but sometimes that 'unwelcome' isn't obvious (maybe someone trying to calm the situation), or it's just accepted in that culture, or that's home life.
You are right, it isn't obvious. I'm not questioning the general assertion that "it's hard to know what is right sometimes." We are all muddling though life, in the end, doing our best. I give everyone the benefit of the doubt here.
What I am saying is that
an appeal to cultural norms or long habits is not a valid justification for continuing a behavior after someone has pointed out that it is unwelcome.
In other words, it's ok to make the mistake. It's not ok to insist on continuing to make it after the mistake is pointed out.
We all think we're right and defend that, even when wrong. The UK had a Prime Minister who is now a clear example.
And so, there will be argument and discussion.
This, too, I think is normal. But there is a qualitative difference in domains like this one.
If the question at hand is a matter of policy or concept that has a third-party effect on everyone, debate takes the form
I think X is better vs
I think Y is better.
In cases like the subject of this thread, though, we are not discussing a neutral policy. This is a person or people asserting
treating me as X is unwelcome. Dissent, therefore, takes the general form
too bad, I think X is fine. If we agree that it is preferable to treat people with kindness and respect (which I believe everyone here does), then we should also listen when people tell us what they find to be unkind and disrespectful.
Now, merely questioning is perfectly reasonable -- e.g.,
Why is X unwelcome? What Y would you prefer? But as soon as we end up back in the territory of
X is fine, something has gone wrong.