Great message. Your apology is clear. The problem the seventh day Adventist have with this is that Sunday worshippers replace the lords day with the Sabbath. That's to say that the new Sabbath is sunday. Which is not true. The Sabbath continues to be Saturday but we the Sunday worshippers worship on the Lords day. The New Testament does not affirm the observation of the Sabbath. The Sabbath was q shadow of the Lords day.

16 Therefore no one is to act as your judge in regard to food or drink or in respect to a festival or a new moon or a Sabbath day-- 17 things which are a mere shadow of what is to come; but the substance belongs to Christ. (Colossians 2:16-17, )