Why is everyone surprised .... this what the police have always done against striking workers.
By design they are meant to maintain law and order ... not to serve and protect people ... the whole 'serve and protect' phrase was marketing campaign by the LAPD created by police propaganda in the 1960s and it didn't have any actual obligation for the police to serve or to protect people ... it was just a catchy phrase that made the police sound good when they in fact could do the opposite or nothing at all. But no matter how they treated people, they always throughout history have always consistently protected wealth, property and those with power.