Are Non Muslims REALLY not allowed to hold high ranks in an Islamic state..?

As we stated before the general rule in Islamic jurisprudence is that: “Non Muslims have the right to serve in any governmental positions which do not have a direct impact on the religious life of Muslims. For example, non Muslims may not serve as Imams (head of state), head of army, arbiters in inter-Muslim disputes or as Zakah (Islamic tax) collectors.”

The Imam (Caliph) is responsible for both religious and secular authorities since they are the successors of the Prophet, peace and blessings be upon him. The leadership of the army is not a secular post, for Islam regards Jihad as the greatest act of worship. This also applies to the Islamic Judiciary system, as it is rooted on the Islamic Jurisprudence (shariah). The same is true for the position of zakah collectors and officials entrusted with other posts of religious nature. Other than the above, non Muslims are allowed to hold any position. Real-life examples of non-Muslims holding high positions in the Islamic state are so vast.

Examples:

Non Muslims testimony: