I said analogies only make sense because they make SPECIFIC REFERENCE between two things. I said that the 'master/slave' analogy is a bigger problem in the USA because of its history with race-based slavery. That's not a dog whistle or a racebait... its a fact, man.
I've not met a single person in real life who has a problem with it. The majority of people who have an issue are also white.
It also conveniently forgets the fact many Africans sold other Africans to the Europeans and Arabs as slaves. Heck, many Africans dislike Caribbeans and black Americans because they consider them to be losers. A dominant ethnic group subjugates weaker ones, who are considered to be inferior and sold off as slaves.
I will add that discourse in the USA has a disproportionate impact on the global community because so much technology literature is based in the USA and, lets face it, the USA has a tremendous political and social influence globally and the USA has a recent tendency to make ITS problems the problems of other people. Hmm, I think the term for that is 'cultural imperialism.' 
Yes, this is why it annoys people from other countries. Yes, the British Empire also contributed to slavery, but it was also instrumental in abolishing it and quite often encountered resistance form Africans.
Perhaps this is something you should consider if you don't want to offend people.
There's one race, the human race. If you had proof of there being more than one you'd be famous.
My eyes tell me. I can tell an East Asian person from a black African and a European. Heck, I can even tell English from Italians, most of the time, based on facial features alone.
Are you saying you really can't tell that Martin Luther King had some sub-Saharan ancestry, where has Donald Trump does not, or very little if he does?
8 billion people on the planet with less than 0.1% gene difference on the highest end. Sociology and mass media will tell you there are races but you shouldn't believe them.
There doesn't have to be much genetic variation to result in significant differences in phenotype. Domestic animals such as dogs for example often have less genetic differences compared to their wild ancestors, yet we can all determine one dog breed from another.
Genetics predict things about people but I've seen no evidence that what people around the world think of is race has any significant correlation as genetics in making such predictions. For instance, being the same amount genetically Spanish a person in the use may well be called a gringo by a person who grew up in Mexico but they could easily share a distant relative.
That's because the countries you've mentioned and lived in have a high degree of interracial mixing. It isn't the case in other countries such as those in Europe, where although many have recently become mixed, different ethnic groups self-segregate and more often than not marry their own kind.
Ethnicity and Race are orthogonal to one another. If race is the smartphone brand, then ethnicity is the specific ringtone and screensaver.
Heritage, traditions, and family recipes have nothing to do with how you look unless you are just assuming they do.
Yes they do, because people tend to marry those with similar values and culture i.e. speak the same language and follow the same religion. This doesn't mean there's an exact definite link, but there is a correlation in genetics vs language even though it isn't that strong.
https://www.eva.mpg.de/linguistics/past-research-resources/language-history/correlating-genes-and-languages/You still haven't refuted my points relating to organ donation and disease.
And why do most people not consider Rachel Dolezal (look her up, of you're not familiar with her) to be black? If race is a social construct then her genetics shouldn't matter, should they?
Personally speaking I don't have a problem with Rachel identifying as African-American in the cultural sense of the word, adopting similar dress and customs. The same is true for many foreigners who come to England and assimilate; it's true they might not be ethnically English, but they might be culturally English.
I don't know if we agree on gender, I can't really sort out what you mean. As someone previously mentioned, participation in society is negotiated. No one gets to demand me speak. My perception and my thoughts are in my language, my interface with the world is a patch work of guesses. If a person feels insulted by what they feel is a misgender or wrong guess then they should be adult enough to consider why that has happened. If for instance, they know they look like a man and were spoken to that way then the adult thing to do is suck it up. I think we agree in this area but I remain unsure.
I know I have a big head and I know I'm ugly. I suck it up.
A big problem is words have become muddled up by activists, hence the reason for this thread. Unfortunately the word race has become politicised, especially in the US. It's why I often read articles which say thing such as race is not linked to genetics, then continue on with evidence to suggest otherwise. I find the double-speak perplexing. I don't see race as a political thing, just observable set of physical features present in different human populations. No doubt I probably have an unconscious bias towards my own kind, but that's intrinsic to human nature, whether people like to admit it or not.