1st of all its unislamic and goes against the basic tenets of Islam. SO some ignorant
"muslims" doing it won't change this fact . What's forbidden remains forbidden. Its Commonsense.
There r 1.6 bn muslim in the world. A minute portion of this pop. includes bollywood khan type type "muslims" not to mention heretics and name only secular liberal "muslims". What this fringe group do has no bearing on Islam & muslims.
A lot of this also has to do with ignorance abt the faith and what's permissible & what's not.
Did u read the link i provided. Yoga is a pagan ritual with all aspects of idolatrous worships included. No pagan denies that. And thus its against Tawheed and involves associating partners with Allah (swt), a sin that puts a person beyond the fold of islam. The biggest sin of all.
Yoga, its origins and the ruling on practising it - islamqa.info