Nevertheless, I do understand the commandment, and I will answer your question.
It's really quite simple. I'll use myself as an example.
When I was part of this world's religious system, I used to mock and disrespect God concerning God's Sabbaths, judgments and Commandments "
Wherein in time past I walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience".
I was ruled by my sinful flesh that despised God's Judgments and refused to "Yield myself" to Him, choosing instead to walk in the judgments and polluted sabbaths of men according to the traditions of this world's religions. Paul, before he turned to God, walked in the same spirit. But when I turned to God, I learned, as did Paul, that this man who mocked and rejected God's Judgments and Statutes, must be crucified, or as it is written in Moses and the Prophets, "Put to death". I also learned through study that this doesn't mean to literally commit suicide, but as it is written:
Ez. 18:
31 Cast away from you all your transgressions, whereby ye have transgressed; and make you a new heart and a new spirit: for why will ye die, O house of Israel?
So God teaches me though His Holy Law how to treat others, "Thou shall not Kill". But HE also teaches me how to treat myself. "
Remember the sabbath day, to keep it holy".
So I don't put others to death, because it is against God commandment, but I crucify the old man
"IN ME" who rejects God and His Instruction in Righteousness. In this way, Paul teaches that I am
"renewed in the spirit of your mind" so that I can
"put on the new man", which after God (No longer man's traditions) is created in righteousness and true holiness.
As Paul teaches.
Gal. 5:
24 And they that are Christ's have crucified (put to death) the flesh with the affections and lusts.
So then, as Jesus instructs, I am "Living by" Every Word of God. And the Kingdom of God dwells within me, and the Temple of God is in my mind. Therefore "Work shall be done for six days, but the seventh is the Sabbath of rest, holy to the LORD."
So Whoever does any work on the Sabbath day,
in the Kingdom of God that dwells in me,
"he shall surely be put to death".