I read the day was Friday and the Jews differed with the prophet, they chose Saturday, consequently it was enforced strictly on them:
16:124 The sabbath was only appointed for those who differed over it. And indeed, your Lord will judge between them on the Day of Resurrection concerning that over which they used to differ.
First off there is no indication that they were differing with their prophet over this, only that they had differences with one another.
Second, there is no mention of Friday being the original Sabbath whatsoever. This sounds like pure speculation.
2:87 ... But is it (not) that every time a messenger came to you, (O children of Israel), with what your souls did not desire, you were arrogant? And a party (of messengers) you denied and another party you killed.
Sorry, but that is an entirely different surah, not relevant to the issue of the Sabbath.
I believe it but with objections, the concept of neighbor was explained in the Bible, it is not everybody.
Have you ever heard the story of the Good Samaritan? If so, you missed the point. Replace Yazidi with Samaritan and you might get the point of the parable:
25 And, behold, a certain lawyer stood up, and tempted him, saying, Master, what shall I do to inherit eternal life?
26 He said unto him, What is written in the law? how readest thou?
27 And he answering said, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength, and with all thy mind; and thy neighbour as thyself.
28 And he said unto him, Thou hast answered right: this do, and thou shalt live.
29 But he, willing to justify himself, said unto Jesus, And who is my neighbour?
30 And Jesus answering said, A certain man [read Muslim] went down from Jerusalem to Jericho, and fell among thieves, which stripped him of his raiment, and wounded him, and departed, leaving him half dead.
31 And by chance there came down a certain priest [read mufti] that way: and when he saw him, he passed by on the other side.
32 And likewise a Levite, [read Sayyid] when he was at the place, came and looked on him, and passed by on the other side.
33 But a certain Samaritan [read Yazidi] , as he journeyed, came where he was: and when he saw him, he had compassion on him,
34 And went to him, and bound up his wounds, pouring in oil and wine, and set him on his own beast, and brought him to an inn, and took care of him.
35 And on the morrow when he departed, he took out two pence, and gave them to the host, and said unto him, Take care of him; and whatsoever thou spendest more, when I come again, I will repay thee.
36 Which now of these three, thinkest thou, was neighbour unto him that fell among the thieves?
37 And he said, He that shewed mercy on him. Then said Jesus unto him, Go, and do thou likewise.
Luke