Kyle wasn't trying to put out a dumpster fire. There was another person doing that. When the people lighting the dumpster up turned on this person he ran into the crowd and a chase insued.

This person was wearing clothing that was similar to what Kyle was wearing and when these thugs emerged from the crowd, they saw Kyle believing he was the one putting out the dumpster and well we know what happened then.

I saw a very detailed video on this all caught on camera and I'm 99.9% sure thus is how things got started that night.

Kyle was doing his thing when out of know where this while thing started up.