That is propaganda, not proof. The amount of incorrect information given is staggering. First, there is no federal law enforcement buildings in downtown LA. The only one is FBI headquarters, with is 15 miles west of there, and it's located in a very wealthy neighborhood called Brentwood. No way in hell they'd get within 100 feet of even farting towards that building. The one they are trying to claim is a federal law enforcement building, while is a federally owned building, is actually where USCIS has their offices and conducts AOS and other interviews there. Some of the retreating ICE agents might have ran to it, but vandalism is hardly destroying a building.
As for the vehicles, those were LAPD and California Highway Patrol, not customs and border patrol vehicles that were destroyed.
Again, this wouldn't have happened if ICE and Homeland Security followed the laws and civil procedure for immigration detainment and deportation. They like to claim that their detention subpoenas are tantamount to a criminal arrest and search subpoena, but they aren't. Follow the law, and like this is less likely to happen. Now, don't conflate my distaste for ICE tactics as supporting the riot/looters. This seems to happen in CA quite a bit. Whenever there is a large scale protest, bad actors use the protest as cover to destroy, loot, and cause mayhem. Those a-holes should be jailed. But the people running these ICE sanctioned kidnappings should be held accountable too.