It’s the third major train accident in a year if you include the train derailment that happened two days after the Adamuz disaster

https://en.wikipedia.org/wiki/2026_Gelida_train_derailment

At least the causes were very different. The Adamuz accident took place because of a rail breaking. And it broke in a way that would be difficult to cause using explosives or tools, but rather simply because of not having been checked often enough.

This one was the LZB train protection system's computers crashing, which caused 8 trains to be stopped by the protection system. The train dispatcher then did not follow the procedure for ordering the trains to return running: They were supposed to drive their first couple of kilometres with a reduced speed, but they were ordered to proceed at full speed. 7 did, 1 stayed still. And then one of the seven moving trains collided at a very high speed with the one that was standing. The LZB computers crashing is apparently a relatively common occurrence, and happens in the home country of the LZB system, Germany, as well. It could have been a "foreign entity" (heh, guess which one), but actually there's good reason to believe it was a "regular" software mishap. However, what is sure is that the resulting disaster took place because of dispatcher error, and that cannot have been because of any foreign influence.

yeah I wouldn't put it past the fsb one bit to create this chaos

Low, but not zero. Failures happen, and disaster news gets clicks, so it gets reported on more widely.