Not shure, would say microaggressions are something intentional or at least come from dislikeing the other person. This examples are rude and hurtful but I dont think that they are intentionall and come more from prejudice and bias that people picked up over they life and most people probably doesn't even recognize when doing so.
That's why they're called microaggressions. They're unintentional actions or words that are not meant to be hurtful, but just giving it a little extra thought, it's easy to see how they can be.
Meanwhile, actual aggressions are purposeful and obviously meant to cause harm.
Who says this is any different? Like if you look deep down you will probably find they don't like the person that much either, and only because of her sex and color.