You're playing stupid, its not the kids cell phone video of them throwing a molotov that caused NO damage that got him 5 years hard labor, but that he had the audacity to put posters on a FSB building calling them the "real terrorists".
Nope. These guys are communists who planned to bomb the police departments in their city over Summer 2020 with the idea to provoke the socialist uprising.
They only made Molotovs and trained to use them (which is criminally illegal in the US as well), although they were seeking to make explosives, some elements were seized by the police.
Two of those who repented and cooperated were sentenced to short suspended terms, only one idiot who refused to cooperate was sent to prison.