You are entitled to disagree. But don't you think your efforts would be better served discouraging Dangee from making racially offensive comments, rather than defending, excusing and encouraging his racially offensive comments. For instance, you could have explained to him why his comment was racially offensive. You chose instead to excuse his comment as 'racially stereotyping'.
In addition, you expect to have an adult, rational and intelligent discussion about Dangee's mimicry of another poster's racially offensive behaviour? Really? But OK, let's go.......
There are cultural differences between different ethnicities.
Of course, in food, clothes, accents, language, ceremonies, music, art. In fact there are so many differences it's hard to recollect them all.
But culture can be more multifaceted and nuanced than mere ethnicity.
Within a white, 'English' ethnicity there are many different cultures, goths, mods, rockers, punks, OAPs, upper class, working class, layabouts, scroungers, politicians, estate agents
, Gay, homophobic, Christians, even racism is a culture, etc, etc. They don't all have moral and presentable ethics, nor honesty, nor integrity. But the exception does not prove the rule, nor does it disprove it.
Some cultures do have undesirable characteristics that show lack of integrity.
Now this is where we differ. for sure there are some cultures with questionable ethics, with distasteful behaviour, etc. But culture is not dependent on ethnicity. And Dangee addressed his offensive comments to an ethnicity, not to a culture.
You might argue Dangee is stereotyping, but I disagree it's showing racism or bigotry.
Stereotyping is also known as prejudice, especially when it is behaviour displayed against several foreign groups, and even more so when it is blatant mimicry of another's racially offensive behaviour. That prejudice, discrimination, and offensive behaviour is also known as racism, especially when it is manifested against an ethnicity, not a culture.
Rethinking racial stereotyping, prejudice, and discrimination
Racial stereotyping, prejudice, and discrimination reflect the human tendencies to conceptualize and value certain configurations of phenotypic features differently, and act on these thoughts and feelings in our interactions with members of racial categories.
https://www.apa.org/science/about/psa/2006/04/maddox
If a persons experience is that a certain culture is perhaps untrustworthy, I see nothing wrong with perceiving that characteristic to be connected to that culture.....provided it doesn't become unconscious bias and that person doesn't pre judge.
So if it's conscious bias it's not prejudice?
If a person is prejudging they are stereotyping, and vice versa.
In addition, you have addressed cultural differences, that is not the same as ethnic differences, see above.