Has the Hinduism been completely purged from yoga in Christian churches? Who knows. Very good arguments have been made here, yours and many others.
But we risk missing the most important point. Because the rest of this discussion really doesn’t matter.
There is no amount of yoga, Hinduism or devils that can move against you if you’re in Christ our Lord and Savior. Trust in the Lord, turn from the ways of the world and accept the Lord’s forgiveness through Jesus Christ who died on the cross for your sins, was buried, and raised on the third day in fulfillment of the Holy Scriptures.
On that we agree!