We don’t put down Christians because they want to observe the sabbath (seventh day of the week) or want to eat kosher, we can understand that if they have a Jewish background. But unfortunately most of the Hebrew Root Movement (HRM), 7th Day Adventist, Church of God, etc. do condemn us evangelical Christians as pagans or unsaved for not imitating them.
All these groups argue that Sunday worship was invented by the Roman Catholic Church, that Sunday is ‘sun’-day to worship the sun god, the mark of the beast, etc. But if Sunday is the day of the sun, then Saturday is the day of Saturn, and Monday the Moon day, etc. etc. If you find the doctrines of HRM are similar with the Church of God & 7th Day Adventists, and the Jehovah’s Witnesses, its not a coincidence, all these religious groups originated from the same source, William Miller’s (Millerites) doctrines, see more here ‘One Law Two Sticks‘.