Bibi said it, himself. The enemy of my enemy can still be my enemy.
Westerners love good guy/bad guy routines and binary assignments. This preference for compartmentalized thought/reasoning has been exploited in numerous ways, long before gender became a target.
If I hire you to kill someone, and you do - you are still a murderer, assuming no extenuating circumstances to qualify deadly force.
If, say, Israel were to support and help to organize terrorist groups like Hamas to attack it and other Western powers… Who is the bad guy?
Both are. Just because Israel is doing something bad doesn't mean the other sides attacking them are good. Just because the people attacking Israel are bad does not mean Israel is good. This … Bug in our ethical reasoning has been exploited on numerous occasions to get us to support people doing evil things against other evil people with plenty of victims caught up in the crossfire.