Most of the protests nothing happened. Frequently, cops targeted them and antagonize them. Sometimes cops infiltrated them and acted as agent provocateur to get people to commit these acts (there is video evidence of this).

Regardless, it doesn’t undermine anything. Any sufficiently large group will have these things happen even without provocation. It doesn’t change the fact that there are fundamental issues that still haven’t been addressed.

Calling every group you don’t like terrorists doesn’t tell you anything. In the civil rights era, MLK’s peaceful protests were frequently called riots because people who benefitted from the status quo didn’t like them. Meanwhile police were beating them, shooting them with fire-hoses (or worse), and doing whatever they could to them and they weren’t called terrorists because they are the state.

Terrorism is a loaded word intended to draw an emotional response. It doesn’t give any information on the morality or legitimacy of a group. Discuss their actions and their goals if you like. The word terrorism is mostly useless.