Because it's grounded in misguided moral grandstanding, most of these business owners are not made up of members of "your community".
So when these people rebuild/recover after this (If they can) and people still do business with them, what was the point? You want to hurt a business you do not like in your community? Then boycott it. Organize and spread that message. Convince enough people not to shop there and they will go away if that is what you want. If people are spending money in a place that does not support them, then burning it down will not do anything. Once it is back up they will keep spending their money in the establishment.
When that Korean beauty supply owner went upside the head of that black woman you had men trying to preach to the women not to shop there, but they still did. If those men burnt the business down then those same women would of went to another place that does not respect them.
It is easy to burn shyt down but it is not easy to organize a coherent and effective response to mistreatment. One of the things people forget about the Civil Rights movement is that they did not only march, but they economically boycotted businesses that were segregated or mistreated black people.