E.G: there is a strong racism culture among Catalonia independentists, even against other Spaniards. They even invented part of their cultural heritage to sound more credible (look up their "ancestral cultural dance" origin, it is kinda funny). If you want your independence, not alianating the rest of your neighbors for decades can be a good start.

Those events are never unfolding in an instant, but are the consequences of years of complex shenanigans.