Why is food categorised as per religion? | Ghanti Bajao

Fruit stalls with orange colour, banners saying Vishwa Hindu Parishad approved fruits was a common sight at Jharkhand's Jamshedpur. But soon all the banners, flags were removed by the Jharkhand police. ABP News shows the ground report from Bihar and Jharkhand from where Bhagwa flags were put up on stalls
On the other hand 'Halal' word is also wrong
The question here is why are food items being categorised as per religion?