As hundreds of thousands throng Hong Kong’s streets in the annual pro-democracy march on July 1, fuelled by opposition to the now-suspended extradition bill, Zain Syed, 25, a British-born Pakistani, is among protesters fighting for the future of his adopted home.Clad in black, the colour adopted by demonstrators, Syed is exhausted from the searing heat and crowds, and has not eaten since waking up. He is among ethnic minority members in the city – an often marginalised group – who stand with…