I don't know.

This itself seems like propaganda to blame the unrest on TikTok or foreign countries, rather than fundamental issues within Spain or Europe generally.

It can both be true that TikTok was a factor in the increased property damage and that Spanish citizens are unhappy and ready to protest. Or that 130 people were ready to do property damage and there also, TikTok videos.

It's hardly surprising that ≈0.01% of the population of Barcelona are ready to do property damage. The only surprising thing is that they managed to all be at the same place at the same time. Identifying Tiktok as one link in their organizing process doesn't mean Tiktok is to blame, but it suggests that one way to prevent future occurrences could be e.g. to have a dedicated police unit monitoring social media content so they're not caught unawares.

Or foreign influence campaigns target legitimate greviances but attempt to expand the grievance beyond all proportion, reframe the concerns from solveable to evil vs good and attempt to purposefully inflame emotions rather than solve problems in order to weaken unity and ability of rival states to act against the agitating nation.