Manager with poor disgusting customer service

I booked a table for 20 for my sons birthday. Worst present I could have gave him. We went to the mention place as per my plans also advised its a birthday celebration for my nine year old. We got there in time and people were there for their different celebrations. We started singing and cheering fir the birthday boy when JP the manager came with rage telling me Im making noise for his cooperate customers. As I mentioned people were having fun those so called customers were talking on top of their voices and that did not bother me because were there is alcohol the noise level is bound to increase. On our table there was no alcohol just kids singing for their friend I was very perplexed. Not even an hour after that a group was also sing to their own a birthday song but to my surprise they were not reprimanded. That only left me with the conclusion its a skin colour issue and I was not aware I had to mention my occupation in order to be treated with respect or be of a lighter skin to be treated equally. JP ruined my night and he should get some customer service training if that is what he needs if skin was the problem then he should look for another job. Such disappointing service