Racist or classist? Purporting racism as the primary issue circumvents middle/lower class white UK citizens who aren't held in high regard either.
It sounds as though you may be connecting racist ideology to homogenous countries, as well as exemplifying an understanding of monarchies based on the context of Britannia. That doesn't work.
It also looks as though you came to conclusions somewhat less than objectively, thus the utter lack of any sources or statistics. Racism is very real in many ways. But to use the term in regards to a very vast arena such as internationally diverse monarchal systems without definitively separating racism from classism is irresponsible.
If we claimed classism instead of racism, there could actually be a lot more benefit when presenting the problems of monarchy and making a case for it changing or being eradicated altogether.