If you wanted to say, Sikhs are not treated well by Pakistani Muslims, then thats wrong.
Pakistanis and Muslims have great respect for all other religions, and even for this day.
Things like that happen in India too. During Eid-ul-Adha, Muslims are forced not to sacrifice a goat/cow, by Hindu Extremists.
Why don't you post that? Want to discuss this issue?
Well then, Sikhs in Pakistan have all rights to practice their religion and teachings. If you post the whole article, it was CLEARLY mentioned that the tradation was involved with heavy drums and other types of 'Holy music' which would interupt in the worship by Muslims and was disturbing them.