This is not Jihad which has a noble meaning, it is common first name among Lebanese and Syrian Christians. Mujahid is more common among Muslims. What you described is Kufr, which literally means deliberately covering the truth or misleading. There has to be better legal word which applies across the board for taking advantage of someone which can be done by anyone of any religion and both sexes.
'In Arabic, the term kufr literally means covering or concealing something, and in a religious context, it refers to hiding or denying religious truth.'