Sad to see so many people here in the comments jump the gun and think of Russia.

Some local context: Today is "prinsjesdag" when the budget is announced. Protests are common, particularly when sensitive decisions are made. There are multiple organized protest movements in the country that have used physical force in the past and some of them had announced protests for today.

Could it be Russia? Yes. But local protests seem significantly more likely. Moreover, if I were Putin I wouldn't expose my foreign agents this physically. I would use them in much more insidious ways such as actually starting or supporting these protest movements. In a similar vein: Could any shooting in the US be caused by foreign agents? Maybe. But usually there is a much simpler explanation; guns and bitterness.

If this was a protest it would be clear who did it. The farmers' have no incentive to mess with infrastructure without being visible for their cause.

Protests draw attention to your cause. This doesn't draw attention to anything, it is straightforward sabotage. Neither is it in line with how typical protestors operated before.

You are jumping to the assumption that foreign agents wouldn't be exposed, but any willing idiot can be bought to conduct such activity. Recent research in Denmark showed that sabotage comes, most likely, from locals, persuaded by foreign actors.

So two things could be true at once. A local 'protestor', disengaged through some issue (whether climate, farming or anything else), persuaded to join some 'resistance' by anyone.

I don't expect this to be supported by local protesting groups, like FDF or XR, either. Way too risky, media-wise.

Why is it sad for you for people to assume that recurring events with the same source are a base assumption to be made?