Nationality does not belong to "ser"
Fabian le gusta montar a caballo.
it means to be mad, or have negitive feelings towards someone or something
If something seems temporary, use estar, if it is more permanent quality, use ser. When you are thinking about whether to use ser or estar, consider which question the verb “to be” is answering. If you want to talk about ‘where’ something is, use estar.
