I'm actually not sure how much of a thing "microagression" is. It seems to me sort of a boutique issue, which a few young folks and professional social critics are prone to latch on to as the issue-du-jour, but which inevitably fades away as a whole lotta' nothing. I know not a single person in my social circle who is on board the microagression train. And that includes some ultra-liberal folks.
This is poor parenting. Social skills are taught, not inherent. In my house, no phones are allowed at the dinner table.
I don't want to get bogged down in this one theme, but I can tell you that the alt-left are using 'microagression' as another tool in the limitation on rights, specifically free speech. In the US, shutting down free speech is particularly hard, due in large part to the 1st amendment. Right or wrong, "hate" speech is protected. If it weren't then we would have a panel of 'experts' trying to decide what is hate speech and what isn't. Frex; 'you people' has NO ethnic or racial content. However, those with the 600Lb chip on their should have taken up the cudgel that 'you people' is now racist. Well just eff that. I'll write or say 'you people' with any social/civil organizational makeup I want. If I'm talking about or to a group of MDs I might use 'you people'. If I'm talking about a group of youths who are causing havoc, I might use it, no matter their gender, color, religion, etc.
Schools and some civic dept are now on the microagression bandwagon trying to use it as a method for limiting rights. It's another of the end-around deals just like the Fast & Furious was an end-around trying to limit the right to keep and bear. This is a major problem with progressive thinking. That you can substitute some kind of elitist panel of experts to decide what is, and what is not a right. Strangely, many liberals think that the labors and materials related to health are somehow a right. That a person has a right to take from those who invest wisely in their health and give that same benefit to those who choose to live unwisely, and don't invest in their health. my answer to that is in the US - there is absolutely a clear right to PURCHASE health insurance. No one from the gov, or private industry will ever limit or eliminate your right to BUY insurance. But - that's not what the libs want. They not only want to limit what is said, written, etc it all needs to be authorized, validated, but they need to control how, where, when, why things get done or not done.
This is in direct contravention of what the US is all about. We are about liberty. We are about equality of opportunity, not equality of outcome. We are about leaving people alone, unless they are in dire condition. All this focus on never hearing a bad word, and everyone singing the correct song, in the correct verse, and don't let your lawn grow over 2", and make sure your teeth are brushed every morning, and your car doesn't pollute more than 1 microgram of CO, and no one can ever, ever be offended. Just makes me sick. In fact, it makes me want to go out and offend as many liberals as I can possible work in my schedule.