What is the fate of a Christian who fights alongside a Muslim to liberate their homeland, and both die, taking into account that the Muslim's reward is Paradise, and that Allah Almighty said: "And whoever desires a religion other than Islam, it will never be accepted from him"?

The fate of disbelievers from among the Jews and Christians is the Hellfire, wherein they will abide forever. Their worldly deeds, such as building hospitals or defending their homelands, do not change their state, because these actions hold no value without faith. Whoever doubts their disbelief has disbelieved, because he has denied what is known by necessity in the religion, for Allah Almighty says: "And whoever desires a religion other than Islam, it will never be accepted from him, and in the Hereafter he will be among the losers." And the Prophet, peace and blessings be upon him, said: "By the One in Whose Hand is the soul of Muhammad, no one from this nation, be he a Jew or a Christian, hears of me, then dies without believing in that with which I was sent, except that he will be among the people of the Fire."