What Happens If They Keep Shabbat?

The Rambam in chapter 10, Halacha number nine, says that a gentile who studies the Torah is obligated to die. Just like it says in the Gemara, Tractate Sanhedrin, page 59A. They should be involved only in the study of the seven mitzvot, the seven Noahide laws. That's what they're allowed to study. Similarly, a gentile who rests even on a weekday observing that day as a Shabbat is obligated to die. Meaning, it's all death by heaven, not Jews are not going to go kill that person. Bet Din is not going to kill that person. But the point is is that when when a gentile decides to make Shabbat Shabbat, he keeps Shabbat like the Jews, it's death penalty. It's not a mitzvah for him. He says, "Okay, you know what? I'm not going to keep Shabbat. Saturday as Shabbat, I'm going to do Wednesday. Wednesday, I'm going to refrain from work, refrain from driving, refrain from writing. That's going to be my Sabbath." Death penalty, that the Rambam says. Death penalty. Why? He says, "Needless to say, he's obligated for that punishment if he creates a festival for himself." You created a new holiday, you created a new religion. The general principle governing, the Rambam says, the general principle governing these matters is that they are not allowed to originate a new religion or create mitzvot for themselves based on their own decisions. They may either become righteous converts and accept all of the mitzvot of the Torah or retain their status without adding or detracting from them. If a gentile studies Torah, makes a Shabbat, or creates a religious practice, a Jewish court should beat him, punish him, and inform him that he's obligated to die. However, he's not to be executed.