Why would he keep making such a big deal about keeping the sabbath day if he believed otherwise? He seems to be absolutely obsessed with it. An elderly man on my mail route who attends the Worldwide church of God (Armstrongism) believes that Christians who do not keep Saturday sabbath are going to hell. He even warned me once that I need to tell my employer I cannot work on Saturday because it's the sabbath day and if I continue to work on Saturday then my salvation will be in jeopardy. Seventh-day Adventists teach that the near the end of time the "mark of the best" of Revelation 14 will be placed upon those who worship on Sunday instead of Saturday.Do you believe Christians who do not keep Saturday sabbath are going to hell?
Bible Truth Versus SDA Doctrine - Mark of the Beast (nonsda.org)
It would appear that certain Sabbatarians take sabbath keeping to the extreme and turn it into a 'legalistic prescription' for salvation. I'm curious to see if dlj57 actually gives you a direct answer of either YES or NO to your direct question. My answer to your question is NO.