Are you fucking serious? There are seriously corrupt cops, and they often get away with things they shouldn't get away with. I'm not going to debate that. But are you seriously, genuinely trying to say that cops are worse than fucking ISIS? They murder people all the time. They destroy entire towns, they decapitate people and record video of it. Get the fuck out of here with this bullshit, of course ISIS is worse. Get the fuck out of your bubble and understand that there is a world outside of people being discriminated for being black, and instead of them being racially profiled they're just executed instead. Jesus Christ, get a grip.
You see a cop. You trust cops. You walk up to the cop and say "hi." The cop shoots you, because he happens to be a bad cop... or he is simply scared of you for no reason. Or, he doesn't shoot you, but you never know for sure until you try it.
You see a member of ISIS. You turn and run. You don't get shot.
So, who is better? The cop who shoots you, or ISIS who doesn't?
If you KNEW the cop was going to shoot only the bad people, your trust would be well founded. As it is, you can't trust him.
But you CAN trust ISIS... to shoot you. So you run and are safe.
Cops are way worse than ISIS.

You're ignoring the fact that the staggering majority of cops are not corrupt. Most of the time you walk up to the cop and say hi he just says hi right back. Stop talking shit.
Corrupt cops are a problem for sure, but you can't just ignore all the average to good ones just because some of them are scum.