Dead Qassam rocket engineer has a kid

From Ma'an:

Four months after his death, the wife of Gaza’s famed Qassam projectile engineer gave birth to his son, named for his grandfather Yousef Al-Mancy.

His father, Amir Yousef Al-Mansy, was killed on 10 January 2008 [sic.] when an Israeli warplane targeted him while walking in one of Gaza City’s streets during the latest war on the coastal area

Amir was wanted by Israel as a leader of the Al-Qassam Brigades and the developer of the Al-Qassam projectile. He is also said to have been the first to launch a Grad projectile into Israel. He lived in the At-Tuffah neighborhood of Gaza City.

The Palestinian Center for Human Rights called this "famed" leader of the al-Qassam Brigades a "civilian" in its list of Gaza victims (#959.) They said his job was as an "Engineer/member of the Civil Defense."

If he was a "civilian," who did they call a militant?