There is a difference between "rioters destroy businesses during BLM protest" and "BLM destroys businesses."So Lacius is calling thousands of business owners who claim the contrary liars.
So did he light it on fire himself?
https://disrn.com/news/black-lives-matter-rioters-destroy-black-owned-business/
The vast majority (approximately 95%) of BLM protests were completely peaceful, and much of the violence was police-instigated, caused by people looking to start trouble like Kyle Rittenhouse, etc.