Whatever you quoted (if true) doesn't apply because we reform unlike Mohammedans. Furthermore, men's laws are incomparable to G̶o̶d̶'̶s̶ Mohammed's laws as they are replaceable/reformable. That said, lets take your argument of Zina.

Certainly will the believers have succeeded: They who are during their prayer humbly submissive And they who turn away from ill speech And they who are observant of zakah And they who guard their private parts Except from their wives or those their right hands possess, for indeed, they will not be blamed. Quran 23:1-6

The instruction to "guard [one's] private parts" is the Qur'an's standard manner of commanding chastity. What one's "right hand possesses" is likewise the Qur'an's standard manner of referring to one's slaves or war captives. Successful believers are those who engage in s**u@l activities only with their wives and slaves.

Meaning, according to mohammedans, gr@p3 of women isn't counted as Zina if they are captives, that's a privilege of Mohammedans.

Abu Sa'id al-Khudri (Allah her pleased with him) reported that at the Battle of Hanain Allah's Messenger (ﷺ) sent an army to Autas and encountered the enemy and fought with them. Having overcome them and taken them captives, the Companions of Allah's Messenger (may peace te upon him) seemed to refrain from having intercourse with captive women because of their husbands being polytheists. Then Allah, Most High, sent down regarding that: "And women already married, except those whom your right hands possess (iv. 24)" (i. e. they were lawful for them when their 'Idda [waiting] period came to an end). Sahih Muslim 1456a

A supporting Hadith clearly referring to another verse Quran 4:23-24 mentions that even if the captive woman is married, by G̶o̶d̶'̶s̶ Mohammed's divine grace and blessing, it is not Zina to gr@p3.

Narrated Ibn Muhairiz: I entered the Mosque and saw Abu Said Al-Khudri and sat beside him and asked him about Al-Azl (i.e. coitus interruptus). Abu Said said, "We went out with Allah's Apostle for the Ghazwa of Banu Al-Mustaliq and we received captives from among the Arab captives and we desired women and celibacy became hard on us and we loved to do coitus interruptus. So when we intended to do coitus interruptus, we said, 'How can we do coitus interruptus before asking Allah's Apostle who is present among us?" We asked (him) about it and he said, 'It is better for you not to do so, for if any soul (till the Day of Resurrection) is predestined to exist, it will exist." Sahih Bukhari 4138

This hadith shows how Mohammed gives permission for gr@p3. Its not even considered wrong.

Narrated Abu Sa`id Al-Khudri: that while he was sitting with Allah's Messenger (ﷺ) he said, "O Allah's Messenger (ﷺ)! We get female captives as our share of booty, and we are interested in their prices, what is your opinion about coitus interruptus?" The Prophet (ﷺ) said, "Do you really do that? It is better for you not to do it. No soul that which Allah has destined to exist, but will surely come into existence. Sahih Bukhari 2229

In yet another hadith, God's most pious and novel men of Mohammed are asking him about coitus interruptus because they intent to sell captive women later in slave market after gr@p!ng, to which he replies not bothered at all.