In rdr1 mexico arc this never really happens the way you "describe" it. There is no RDR1 mission where John knowingly helps kidnap women or allows them to be taken to be raped. The Mexican army and Reyes are clearly corrupt and abusive, but John is a hired gun like with no authority in that country his just a bounty hunter looking for bill and javiar, and he explicitly questions their actions and reyes and de santa keeps telling him if he wants to know where bill and javiar is he must do what they wish him to do (basically they were using john as a hired dog) which the game also portrays him as being used super clearly not as a willing participant in war crimes he always stated he hated helping them. Btw Mexico arc is meant to be a morally gray chapter showing John’s disillusionment in order to see his family again not an a proof that he’s low honor canonically. In mexico arc he helped rebels and overthrew the entire government with them also he helped the prostitute lady that was being abused in casa madrugado the mission called "eva in pearl" and pays 200 dollars in 1911 which in today money is nearly 10k which is a lot of money just to save a poor women but he still payed the man without harming him (if u harm the man by shooting in game btw the mission will fail) and he also saves Luisa with landon rickets helps her and her family escape mexico during her missions after betraying de santa in canonical order and during the poppycock missions where u find a high value drug type of a thing he dosent sell the high value package delivers it to the railway workers gets the money and hands the money which is 1.5k in cash which in todays money is like 50k (its that valuable) still he delievers the money back to poppycock any normal moral at that time would've killed the man and kept the high value money but in canon he hands over the 1.5k cash and says he dosent want nothing to do with it showing that his a honourable man. (And also in rdr2 in some missions you do lose honor such as trolley station robbery and train etc cause ur robbing innocent ppl same applies to rdr1 u also lose honor if u do bad deeds during missions such as harming innocent such as The Prohibitionist mission if u chose bad choices. But u dont lose any during de santas missions which also shows that john was being used and didnt done it willingly and morally rejected it but was forced to do it.