This is where conservative politics always leads. Think about the time when you became friends with a coworker based off your mutual dislike of another coworker. Now imagine that is the only way you can make friends with someone. That is the conservative movement in a nutshell.
What would become Britain France and Germany were all roman provinces(Britannia, Gaul, Germanium) who had a mutual hatred of the Roman Empire. What we think of as the "fall" of Rome due to "invasion" from "barbarians" was actually one of the most successful anti-colonial movements in human history. The sting from the years of roman rule persisted to the point where one of England's national songs has a line "Britons shall never be slaves". They WERE slaves. They were traded as slaves when they lost wars against ottomans and were traded as slaves while being dominated by the Romans.
When they expelled the romans and when they expelled any foreigners from their lands they would always then turn on each other. Rulers would always use those who are different in some way as a scape goat( archaic versions of immigrants and usually anyone who was not following the dominant religion) when those scapegoat were eliminated you got stuff like witch hunts or sectarian wars where they started accusing each other of not being pious enough or having a heretical interpretation of the Bible. These people ONLY have negativity because their ideology is based on exclusion.
So whatever fracturing you'll see within the maga movement, it will most likely be from the nazis who are furious that they arent reappropriating tech companies run by Indians and east asians(like Microsoft, google, Nvidia, AMD). They'll be mad that the work permits are going to Indian tech experts instead of their white counterparts. They'll be mad that their tax dollars are housing immigrants in detention centers instead of just sending them away or killing them. They'll be mad that there are women and jews in the movement who still have power. It wont be sufficiently white enough for them and they'll start doing what they always do and using violence to get their way.
Eventually one of those nazis will kill an influential Jewish, south asian or Latino magat. The leaders of the movement will of course blame antifa or liberals with zero evidence because things like "facts" "logic" and "proof" dont matter to a movement that is only focused on placating the feelings of white people who have no achievements and need to blame their failures on literally anyone else. This will only keep working for so long until the nazis openly take responsibility for the killings and demand a bigger seat at the maga table.
Ironically that will only motivate regular people to be unified in THEIR hatred of the maga movement and its alignment with nazis and complete contradiction of established propaganda* around America's stance on nazism. I think because the nazis know this, it will only fuel their impatience and make them want to complete their political project faster before a unified countermovement of normal people who dont want to live under nazi rule fights back and destroys the maga movement by overwhelming it with sheer numbers.
* the story most of us are told is that america fought and killed nazis in ww2 and was on the right side of the issue of white supremacy. The actual facts are that america not only allowed powerful nazis to remain in control of west Germany, it also invited them into america.