However, I agree with the complainers. Even San Antonio doesn't have bilingual police patches.

If they need something identifying them as police in Arabic, have a separate patch that simply says "Police شرطة:"
Like this one from California:

This way, they are identified as police in Arabic.
Brownsville is 90% Hispanic and their badges are in English

Searched the web for bilingual official police badges and I could not find any.
I agree with the need to identify oneself as police officer. However, police are "neutral". If another language is needed add an extra generic patch, but don't use the city's official. The one designed is multicultural to celebrate Arabic heritage. I don't know how to incorporate it without using a language, but I don't think using a language is the way to do it.
They do have Hasidic first responders in NYC, but they are their own private organization and don't service non-Jews. https://en.wikipedia.org/wiki/Hatzalah
And Muslim Community Patrol, which is also private: https://www.nytimes.com/2019/02/03/nyregion/muslim-community-patrol-brooklyn.html
If Arabs want to start their own service, like in NY that's fine. (But I don't think they have the resources to do it)
Oh well, if someone can find an "official" police badge that is bilingual, then show me and I will change my mind.