Questions on the Explanation of the Book of Nullifiers of Islam

Question:
I hold the nationality of one of the disbelieving states, and consequently I enlisted in their military and entered their army for service. Is this considered taking them as allies or showing loyalty to them? And what is the ruling on obeying them in fighting Muslims?

Answer:
This is not permissible. This is what we are discussing now. Assisting them in fighting Muslims is supporting them against the Muslims. Entering under their rule and taking their nationality is entering under the rule of the disbeliever. This is not permissible. The fiqh councils and scientific research bodies prohibit a Muslim from taking the nationality of the disbelievers. They prohibit this because if he takes their nationality, he submits to their laws and they gain authority over him, becoming part of their state. This is not permissible.