I suppose you tag as right wing #Kurdish, #Tibetans, #Scottish, #Quebec and #Iceland people, #Algerians, #Croatians, #Indians, etc. And lefists #Turkey, #China, #Bristish Imperium, etc.
That is, obviously, false
People has the right to rule themselves. And other nations have NOT the right to force them to be ruled by them.
It's an obvious statement.
People could be wrong or not (with Brexit, Scottish referendum, etc.) but people has the right to be wrong. You, as Spanish, have not the right to force Scottish or Catalans where you think. Let them to decide it in a democratic referendum. England, Sweden, Canada, etc. do. Spain, China and Turkey not.
It's not about left or right. It's about nationalism. And Spain, supported by most of Spaniards, practice a nationalism with their violence (police, law...) and, some lefist Spaniards talk about "tags", or good or bad leftists...
I repeat myself, it's not necessary Norvergian or Scottish think they are "better" than their neighboutrs to like the idea of self goverment. The same when you want to divorce of your partner