> There’s probably a huge case for corruption

Yes

> And of course he can be declared national threat and foreign agent

There is no evidence of that he is a foreign agent and there is no legal procedure (nor should there be) for declaring someone a "national threat."

> When there’s choice between the bad (block Trump and allies) and the worse (his ideas stay alive even if he is no longer in business)

This is inevitable and any government that tries to act against holders of an idea is a tyranny

> Legal matters are secondary, as long as majority is convinced that justice is served.

That is mob justice