What is not jazz? Classical, rock, country, techno, flamenco, Japanese traditional music etc. are not jazz. What remains could be called jazz. Perhaps any kind of music heavily based on improvisation can be called jazz. Is Indian music jazz too? Well, I wouldn't call it that but someone could call it Indian jazz. No objection from me. Persian music can be very impovisational too but not at all always so.
Yes, I don't like "classical jazz", with some exceptions.
Yes, I don't like "classical jazz", with some exceptions.