Originally, Sikhs and Hindus were known as money-lending communities. They were very affluent. The ones who could leave have left. But out of necessity, the ones who remain are essentially relying on each other. So if you go to a Sikh corridor in Kabul, you will see that Sikhs and Hindus are essentially living together, worshipping together, and once again, that's out of necessity. They've just formed that bond.
On July 18th, 2016. See this statement in context.