1.
The Arabic word Injil (

??) as found in Islamic texts, and now used also by Muslim non-Arabs and Arab non-Muslims, is derived from the
Syriac Aramaic word awongaleeyoon (


??) found in the Peshitta (Syriac translation of the Bible),[1] which in turn derives from the Greek word euangelion (



?)[2] of the originally Greek language New Testament, where it means "good news" (from Greek "??


??"; Old English "g?dspel"; Modern English "gospel", or "evangel" as an archaism, cf. e.g. Spanish "evangelio")
The Syriac language is a dialect of Middle Aramaic that emerged in Edessa, Assyria-Upper Mesopotamia, in the early 1st century AD, and is considered
closely related to the Aramaic of Jesus.Wikipedia.
So the basis of word Injeel is derived from Syriac aramic, which is closely related to the aramic of Jesus a.s.
2.
There is nothing in that verse like Allah wanted a sacrifice.
It was not accepted from one person because Allah does not go for the materialistic form of sacrifice, He would accept the taqwa,which resides in the heart.
And recite to them the story of Adam's two sons, in truth, when they both offered a sacrifice [to Allah ], and it was accepted from one of them but was not accepted from the other. Said [the latter], "I will surely kill you." Said [the former], "Indeed, Allah only accepts from the righteous [who fear Him or muttaqeen].(5:27)
The other person was lacking taqwa.
3.
If Prophet Muhammad s.a.w.w. had justified the black kid,it means the woman had not committed the adultery.It also points towards the science of genetics.
There is no indication from the hadees that the woman had committed adultery, and the colour of the boy is not any evidence to convict someone.The hadees provides the rule.
4.
The case which was allowed only for Prophet Muhammad s.a.w.w. was WITHOUT paying meher.If any girl wished to do so,sh was allowed without receiving meher.
For all muslim men, paying meher is obligatory unless the wife voluntarily leaves her right of meher.
If all these women were allowed ONLY for Prophet Muhammad s.a.w.w, then no muslim man could marry his cousin, as the verse mentions them as well.
It is the condition which is only for Prophet Muhammad s.a.w.w.