No it's not.
There are no post-menopausal women suddenly "becoming" mutants.... but an elderly Inhuman woman could easily be transformed by the T-cloud.
You people act like the NuHumans are all teenagers struggling through puberty and trying to fit in, when there are grown women (like Naja, presumably) who are NuHumans, retired men in their 50's (like Nur/Frank McGee), young adults (like Inferno), teenagers (like Flint and Iso), and even infants (like Inferno's nephew) who have been transformed. If you can't distinguish between Inhumans (even NuHumans) and mutants, it's because you're choosing not to.
Yeah. Because that's what Naja is.... not a snake-woman who can blend into anything, she's a big fat woman from the midwest who vomits to make herself regular-sized n between fighting crime. Jesus. Why does every single Inhuman character have to be compared to a mutant? I don't see people saying Wolverine's a rip-off of Gorgon because he has an awesome beard, an abrasive personality, and are loosely based on both a goat and wolverine respectively... (but that would be stupid, right?).
Neither party is being disrespectful in that scenario.
Medusa resents Black Bolt for unleashing the T-Bomb, and feels responsible for what he did since she was his Queen. Now she's the sole ruler, accepting in these "refugees" (if they can really even be called that, since most of them aren't seeking refuge from anything at all), and trying to assist them in any way she can.
And the NuHumans have a right to be angry, these alien beings crashed down to Earth, unleashed a deadly chemical weapon into the atmosphere and it uprooted their entire life. They're not natural citizens of Attilan, and the royal family has been careful not to be pushy. They're accomodating the NuHumans as best they can -but that doesn't stop some natural citizens of Attilan from seeing the NuHuman as undeserving of terrgenesis or, in some cases, unruly for not obeying or bowing down to the royal family. They're very defensive over their royalty.