Dennis Prager identifies a key benchmark.

I believe the Left has been wrong on virtually every great moral issue in the last 30 years…

In just about every instance, one could say that the Left was foolish, the Left was naive, the Left was wrong, even that the Left was dangerous. But in all of those cases, one could imagine a decent person holding any or even all of these positions.

But we now have a bright line that divides the decent — albeit usually wrong — Left from the indecent Left.

The Left’s anti-Israel positions until now were based, at least in theory, on its opposition to Israeli occupation of Arab land and its belief in the “cycle of violence” between Israel and its enemies. However, this time there is no occupied land involved and the violence is not a cycle with its implied lack of a beginning. There is a clear aggressor — a terror organization devoted to Islamicizing the Middle East and annihilating Israel — and no occupation…

Anyone on the Left who cannot see this is either bad, a useful idiot for Islamic terrorists, anti-Semitic or all three. There is no other explanation for morally condemning Israel’s war on Hezbollah.

Read the whole thing.