Regarding the underlined portion....I agree. Apparently, overlooking petty crime is just the tip of the iceberg. It seems that some consider this justification for slaughter. I can probably guess that you would be as reluctant to throw support behind a movement that was based on killing selected citizens for emotional and political reasons as I am.
The way I see it. If a person is upset about how a law is enforced and adjudicated, there are rational, civil and legal means for them to address this. If your gut tells you something is rotten, then investigate and research to see if your gut is correct. Then communicate your views and seek leaders that reflect those views and drive change that way.
Assembling a hit list is a terrorist act and one that is a risky gamble on top of all of that. What you shoot into motion may explode out of control and out of the original scope that the hits were supposed to create. Russia and the Soviet Union are a great example of that. Russia needed change and that need went number one with a bullet. Then there was 70 years of dictatorship in the guise of communism.
Communism & authoritarian regimes are inseparable dance partners.
Setting aside the theoretical reason for the former requiring the latter,
we can see this in every example country.