Police are the armed enforcers of the owning / capitalist class, in the US they have their origins in Slave catching patrols of the 1700s and controlling exploited workers and putting down labor organizing/strikes. They're the domestic enforcement arm of capital, the hired goons of the elites of their given city, serving their interests, with a monopoly on violence. The core reason for their existence is to protect private property, shutdown political dissent, generate revenue and enforce this unjust system of exploitation and oppression. This is why ALL cops are bastards because they all enforce this unjust system on the people.
Their daily activities consist of fucking over poor people and trapping them in a cycle of poverty. Instead of solving thefts of personal property for working class people, they are themselves active thieves, generating over $12B USD / year in "civil forfeiture", and even more profit through traffic offenses and court costs. You can call them to come stand around and scratch their heads for an hour (if they don't decide to shoot you), but more likely they'll be at a protest being active agents of the US police state where they collect a massive amount of data on "troublemakers" using facial recognition, and military grade equipment, against the citizens they occupy.
Oh but who will imprison the rapists? Not the police: Less than 0.5% of rapists are in prison, despite 1 out of every 5 women being raped in the US. Perpetrators of sexual violence are less likely to go to prison than for any other crime, such as non-violent drug offenses. Police, when not abducting and raping women themselves, or beating their wives and kids in high numbers, have been shown to protect high-status sex traffic rings, and famous, well-connected predators.
Cops have a long history of murdering workers organizing for better conditions. They imprison the poor in huge numbers, 1 out of every 5 black men, and 1 / 7 Latino men are kidnapped at some point and thrown in a cage, mostly for nonviolent drug-related offenses. Cops kill over 1000 ppl a year in the US.
All cops have a duty to uphold those interests, that is their societal function; if they don't toe that line, they get fired. That's the systemic reason to hate them, and advocate for the abolition of capitalist police, and why the only good cop is an ex cop.
But not all cops are bad you might say? Well when they're not spending their time fucking with poor ppl, kidnapping, and murdering people, 4 out of every 10 of them go home and beat their wives and kids. They also kill so many house pets that it's considered a noted statistical phenomenon (30 murdered dogs every day) . So they are also domestic abusers, pet killers, and all around trash on a personal level.
ACAB
https://www.facebook.com/peacereportnow/
https://www.youtube.com/thepeacereport