**Again if you get caught up in the technicalities of lighting fire and a car lighting fire to run being breaking the Sabbath. **
If the Torah condemned lighting fires on the Sabbath under penalty of death, this is not a technicality.
If we go back to the technical issues you miss the point about the Sabbath. The Sabbath stands as a memorial of the 7 days creation, and demand our attention in that day toward God.
Futher elucidation about the purpose of the Sabbath commandment to REST (nothing said about worship) given in Scripture itself says that they should observe it because they were once slaves in Egypt. As I have frequently pointed out, this was an enforced rest from labor that extended to one’s slaves and even farm animals.
But Christians take a wider view of the entire Bible and see it as pointing to Christ.
The commandment to REST on the Sabbath was a figure of Christ’s rest in the tomb from His labor of recreating and restoring a world spoiled by sin. THIS is the true Sabbath rest, which Christ fulfilled.
As the Church sing on Holy Saturday:
“Great Moses mystically prefigured this present day when he said, ‘And God blessed the seventh day’. For this is the blessed Sabbath; this is the day of rest on which the only-begotten Son of God rested from all his works, through the dispensation in accordance with death, he kept the Sabbath in the flesh; and returning once again to what He was through the Resurrection he has granted us eternal life, for He alone is good and loves mankind.”
I have also pointed out that there were (and still are in traditional synagogues) services not only on the weekly Sabbath, but twice daily. Of course, synagogues are a product of the Exile. You will find no mention of them in the Torah.
Finally, since Christ came, is there a day of the week we may keep in an UNholy and PROFANE manner, that we may live according to our own desires? On what day are we NOT supposed to have our minds on God?**