Will a young Christian man who kills his father then commits suicide after losing his mind enter the Fire?

The general texts of Islamic law indicate that whoever seeks a religion other than Islam is a disbeliever, and if they die upon that, their ultimate destination is Hell, abiding therein eternally. This is based on the Prophet's (peace and blessings be upon him) saying: "By the One in Whose hand is Muhammad's soul, no one from this nation, neither a Jew nor a Christian, hears of me, and then dies without believing in that with which I was sent, but he will be among the people of the Fire." And his saying: "Wherever you pass by the grave of a polytheist, give him the tidings of the Fire." The madness of a young man after puberty does not affect the judgment that he will be in the Fire. However, if it occurred before puberty, then the difference of opinion concerning the children of polytheists applies to him.