I don't think you are splitting hairs. Black Cube is allegedly staffed by former Mossad and other Israeli intelligence agencies operatives. I somewhat agree with EB in that it is possible that current active Mossad and its hierarchy are not in the plot against the US. But there is a sh1tload of money in the Middle East dumped there by us and other for the peace process. Not hard to imagine the former intel types following the lead of their brethren and engaging in the same illicit things whilst maintaining contact with their former agency. 0 reason for them not to ally themselves with the DS as they would have had contact with them in their activities.
In sum, MOS can be Mossad as a blanket for Israeli agents and not necessarily the official Mossad. The reason Q and we are circumspect is PC, can't be against bad guys if they are Jewish, that's anti-semitism. They are last, evil is evil despite what they claim as religion.