Demonstrating I understand, but looting? Why?

It is so sad when a rogue policeman takes the life of an individual, black, white, yellow, regardless.  And, it is also sad when other policemen, not necessarily condone, but turn a blind eye to what they are doing.  I don't thing it would be easy to find anyone, or at least not many people that would disagree with that. 

When something like that happens, it is logical that people are upset and possibly go out and demonstrate to show their disgust and seek change.  So far, so good!  But, how does looting and destroying other people's property fit into all this?  I am not a conspiracy believer, but there is only one logical explanation for what is happening in our country right now.

• A white rogue police officer, ends up killing a black man for no just reason, and that's horrible.  A bunch of other policemen seem to be standing around not doing anything to stop it.
• Black and white people are very upset and start demonstrating  asking for justice and for the rogue officer to be arrested and face changes, so far it all makes sense.  The policeman gets fired and doesn't get arrested until 3 days later.  Horrible handling of it by the police department.
• Demonstration continue, only now other rogue elements (antifa??) infiltrate the peaceful demonstrations and start throwing objects at the police, based on previously rehearsed and established plans and they initiate braking store fronts.  
• Mob mentality kicks in and people who would normally never do that, when seeing these instigators breaking windows and looting, they start doing it as well.  This, BTW, does not define the majority of people that peacefully demonstrated for a cause!  However, public perception is formed by focusing on the few that destroy, pillage and loot.  Unfortunately, that's things work.

... More will follow...