No one denies our prophet pbuh was the ruler of the Islamic state. As are the caliphates after him. It’s Christianity which has no doctrine regarding governance

No one denies our prophet pbuh was the ruler of the Islamic state. As are the caliphates after him. It’s Christianity which has no doctrine regarding governance of people, or modern Christians who have weird ideas like religion should not be involved in governance. Someone needs to rule and spread the religion through territorial expansion, as it is the only way people can be saved. Say what you like, but it’s coherent.