How is that relevant to the absurd definition of "anglo-saxon"?
Why is it absurd if this definition correlates well with objective reality?
It's absurd because it doesn't match
a dictionary definition of that word and you need to have a consensus on what words mean if you want to have a conversation with someone outside of your mirror.
If you make up a definition of word "shit" to mean "
a sweet food made from sugar or chocolate", and start saying that you like to eat shit and that this is objective reality, it would still be laughable to everyone else.