Anyone have any tips for this? Once my brain attaches to a certain thought it’s like a dog with a bone, for hours, sometimes days. 

Backstory: my local sheriffs department got a brand new customized sports car to use for their kids and cops program (I think a mustang but still it’s 2 doors, customized saying “paid for by your local drug dealer”) funded by drug money they confiscated. I simply commented on Facebook, wouldn’t that money have been better spent on the actual educational programs themselves or maybe even rehabilitation programs. And OMG. The attacks from other people were UNREAL.  Apparently I’m “salty” because my drugs got taken away or something, idk, people are just RUDE. 
Anyway this was yesterday and I’m still LIVID, like I just have a continuous physical feeling of wanting to punch the wall. I just don’t understand how people think cops should spend money they confiscated from the community, on their shiny new toys. 
But I digress. 

Back to my original question, I know I’m being stupid, letting these internet strangers (though also a part of my community, but still not anybody I know personally) get to me like this. My angry thoughts just won’t leave! I’ve tried visualization and mindfulness and breathing and distracting activities, but the thoughts keep coming back. 
Anybody else have any ideas or skills they use for these kinds of problems?

Thanks for reading! 