I dont understand why its so hard to comprehend unless of course posters do not want to comprehend.
As far as keeping a beard is concerned, there is no comparison between a Sikh & a Muslim. A Sikh cannot shave or trim his hair while a Muslim can , he however may choose to . Its not mandatory for a Muslim to sport a beard. If it were even Jinnah would have kept one . Since he didnt & neither did/ does Ayub or NS it establishes what I am attempting to convey.
Instances like these do come where even Hindus seek permission not to shave for a defined period of time ( Like before a Pilgrimage to Sabrimala or any other shrine where they then go & shave their hair as a part of religious ritual).
Its is a fundamental right to practice his religion but his religion does not mandate keeping a beard to be compulsory , here are pictures of a Qatari Sheikh & those carrying out pilgrimage . I dont think they are any less a Muslim than anyone else.