So you're saying that the former government conspired with the Polish Internal Security Agency to try to get this guy to assassinate the former president?
You are on the wrong track.
I'm saying that the ISA found a dude with a slight mental issues who was talking a lot about awful state of affairs in the Polish politics and started talking big about how it would be good to blow them away and bragging a little that he has a knowledge how to build a big bomb.
Students were talking back and forth and it was all there was and there ever to be. All that had to do was to monitor him just in case.
However some guys in the previous government learned about that and decided to use that case and this guy to blacken reputation of the opposition as he was claiming to be a patriot and giving off about government quite openly.
So, they send agents who told him - OK we are willing to do it - what is you plan and then lead him step by step to the movement when they had enough to present it as a case to the persecution office. In fact there was never a danger of the actual action taking place.
Maybe, but it would have to be proved he is actually suffering from a mental illness first.
Did they even want to? After all it would expose a lot of well placed people.