You know. If they weren't trying to kill one another in a gruesome fashion I'm pretty sure all the heroic spirits would probably be okay with one another. Although they all have different ways to going about things they still generally believe what they are doing is right.
In a weird way its the Holy Grail that really compromises their decisions.
That is kind of how all warfare and conflict works out. On a personal level, most people can get along with each other, but we go to war because there is something contested that we all want or need for different reasons.
You know. If they weren't trying to kill one another in a gruesome fashion I'm pretty sure all the heroic spirits would probably be okay with one another. Although they all have different ways to going about things they still generally believe what they are doing is right.
In a weird way its the Holy Grail that really compromises their decisions.
Except that the list of "heroes" includes the likes of holy warriors who specifically fought wars of religion like Joan of Arc, along with tons of pagans like Gilgamesh or even outright pagan "monsters" or "witches" like Medea, people who personally loathed one another and spent much of their lives fighting one another like Edison and Tesla, as well as there being the likes of Genghis Khan whose idea of lovin' involved kidnapping thousands of women and forcing them into concubinage to the point where he had so many children 8% of Asians have his DNA, and oh yeah, quite a number of characters who are basically unthinking machines of destruction like Tiamat.
One year later and this video finally explains the reason behind this fan art.
I thought it was obvious from the artist comment. Then again, why most of Syatey's works have no artist comment when most of the FGO thing are very context heavy?