Will try to make some sense here.
Christianity, historically has not been the most spiritual of paths. There have indeed been many solid yogis in the Christian tradition, but them have been neither mainstream, nor have they been accepted by the Church as saintly figures. Some of them have indeed been called heretics.
Having said that, in more recent times, there have been efforts to interpret Christianity and its teachings in more mature ways so as to bring down the levels of intolerance that have marked the path of Christ’s followers for a long time. I believe this to be a good thing and if these efforts succeed in making Christianity something of spiritual value, then all the more power to these efforts.
Yoga, most importantly, has been recognised in the west as being something of value – health-wise and spirit-wise. This again is a good thing. Yoga is indeed universal and meant for all human beings and if more people take to it, then nothing can be better.
I feel that Christians who seek to claim that Yoga is as Christian as it is Hindu/Indian, while they may seem to be of the belief that they are universalists, are actually acting out of a certain amount of parochialism and also a certain disdain for historical fact.
Being a Yoga enthusiast is all good and fine, but de-linking Yoga from Hinduism is foolish. Especially when you look at the historical paths the west and the east have taken in order to reach where they are now. Christianity’s march of victory has been anything but universalist (unless you understand universalism to be a universal disdain for anything and anyone non-Christian). By contrast, Indian civilisation (some would call it Hindu civilisation) has been a product of the yogic way of thinking – that all humans are divine, that all things are god, and that the truth is one no matter what name you call it by.
Hindus worship gods who were yogis, Hindu gods have spoken of Yoga, Hindu history has plenty of material to attest to the fact that Yoga was born in India, was refined in India, was practiced in India and was exported from India.
To deny the roots of Yoga in India (here I must add that I do not think everyone on this thread has been doing so deliberately) is not only foolish, it is downright misleading.
What Indians are seeking is not to make Yoga exclusive to Hinduism. All they want is that historical truth be acknowledged. It’s not views, it’s not opinions, it’s not beliefs. It’s simple old historical fact. Yoga is Hindu because that is where it came from. It may have come from elsewhere, but it didn’t. That is what this is about.