In the US? I don't think this shirt would violate any law or get you arrested. There was that guy with the "I eat ass" bumper sticker that got arrested for profanity but the state attorney dropped it because it probably is protected free speech.
guys no cop is going to fuck with you for a t-shirt like this. Ive hung out in the punk scene for decades and people wear clothing with very, very explicit anarchist and anti cop etc language and no cops are stopping people for fuckin t-shirts.
They'll skip that. They can't actually get you convicted anyways, they'll just get the thugs with badges to beat you for "resisting arrest", then shoot you because "they feared for their life".