I see this article continues the use of the politically correct term for Muslims which is “Asians”.
No it isn't. Here in Britain 'Asian' has long been, since years before PC, the conventional colloquial term for anybody originating from the Indian sub-continent, whatever their religion. Thus Hindus, Sikhs, Buddhists, Indian Christians etc etc are all referred to as 'Asian'. There are large numbers of all these in London. The belief that we use the term principally or only to describe Muslims is widespread in the U.S., but mistaken.