Well said.
And what better way to legitimize something like that than saying "God wills it, and I am his prophet - So let me be your ruler".
The Kings of Europe used to use the same scam in the name of Christianity. The Declaration of Independence overthrew that notion, with the proclamation that "all men are created equal" - which meant that no man was born a king, that is, chosen by God to rule over others.
The refrain of the time was that "we have no king except King Jesus". And there was no man on Earth who had any claim on his authority more than any other man.
Mohammed was just another in a long line of creeps who have paraded through history saying "God made me ruler of everyone! And if you don't believe it I'll cut your head off - so give me your money and your daughters".
Sick garbage, nothing more.
Actually, the kings of Europe did not use that scam. Christianity is not a theocratic system, and until the advent of Protestantism, the Church and the State were frequently at each other’s throats. There are two different realms in Christianity, and the only people to challenge this were Calvin and Zwingli, although their theocracies naturally failed (because theocracy and Christinaty are not compatible) and the Protestants then went back to an understanding that separated church and state.
As far as native peoples in the New World, the Kings were actually their protectors - at the command of the Pope, who forbade the enslavement or exploitation of the natives. The truly bad expeditions were all private ventures that were not supported by Spain or Portugal. The Church actually sent priests and religious, mostly Jesuits and Franciscans, to mitigate the situation and defend the native peoples.
Incidentally, native Americans were not converted by force. They were converted by preaching and example, and the sad thing is that many of them then gave up their violent ways, stopped hunting down and torturing their rival tribes - and as a result, were perceived as defenseless and were attacked and killed by other native American groups. This was the case even though the government of Spain had sent troops to protect native American Christian villages.
Part of the problem in the New World, of course, is that the British kept attacking the Spanish. The British killed large numbers of Christian native Americans and Spanish priests and missionaries in Florida, in at least one case by forcing the village into the church and then setting fire to it.