Really depends on what you consider terrorism. Theres plenty of KKK that were never even prosecuted. Theres plenty of police officers who committed acts of terrorisim that barely see prison time. An example of what I would consider terrorist behavior by cops is cops in Georgia framing black people for 10 years specifically targeting black people with no prior criminal history. Theres plenty of other examples of cops using violence to terrorize specific groups of people.
Tell yourself whatever you need to regarding parents. You are mistaking them believing there was potential for terrorism by a parent as targeting parents as terrorists. That you think Garland had to stop because he was exposed is laughable.
Yes, they did attack Congress. Who exactly did Biden appoint at the FBI? This alleged persecution by the FBI is headed by Trumps hand picked guy Chris Wray. If you want to bring up specific cases I will be happy to explain to you why certain people are still behind bars. Its generally because they do things like double down on the stupid that got them there in the first place or went on a gun buying spree. You should be a lawyer though, I am sure all these legal defenses you think help their case would go down so well in court. " Your honor, my client is not guilty because someone else somewhere did something and wasnt prosecuted". Good luck with that. "Yeah, I know I murdered someone but that one officer got away with murder so why am I being charged?".