A police officer in uniform should be recognizable as an
officer.
Here in Texas a highway officer in a marked car must also
wear his uniform hat so he can be easily recognized.
I will let you have the last word.
Texas isn't the last word on how a police officer should appear. If you're in a jurisdiction where police officers wear turbans and are recognized as police officers by their uniform and badge, then you're required to accept the fact that they're police officers. You may not shoot at them. You may not hit them. And more importantly, you may not look at their turban and squeal like a little girl.