Rome had no more trouble with Carthage after it utterly destroyed the city, salted the earth it was built upon and scattered and enslaved its inhabitantsI pretty much agree with you on this. But he didn't flip flop which is what that post stated. But should students who joined an organization in college and had no say in the offensive statements that they put out be penalized? IIRC there were a couple of Jewish groups that signed onto those statements.
And one more question, does this "It is NEVER OK, there are no circumstances that can change that judgement, and I really don't care at this point if Israel just kills them all." apply to civilians old, young, and even babies?
There is a difference between unavoidable civilian casualties during a military campaign and an organization whose sole reason behind their attack was to kill civilians. If it took killing every last 'Palestinian' to stamp out that enemy root and branch, I would allow it