where will his soul go?. Does Allah accept him to heaven who has done such terrible mistake? Allah gave him everything , good parents , family , education, good job, respectful position in society.
Allah was merciful to him , but he used all those gifts against mankind which in turn against Allah.. All people in this world are Allah's creation. Killing one of those creation is unaccepatable by Allah whatever may be the reason. His sin more severe in Allah's eyes because he did this in the name of Allah.
Whoever does horrible acts in the name of Allah are Allah's enemies only. They are sons of Satan born in this world to harm Allah' name.