His analysis is flawed.

For example, imagine if several rockets are fired at a hospital. Iron Dome intercepts the rockets, throwing them off course. The rockets then land in parks and parking lots, killing no one.

Under Postol's standards, that's a complete failure. Because the warheads weren't destroyed.

But most people would judge that as a major success.

Assuming the rockets are reasonably accurate and targeted to do the most damage possible, simply damaging the rockets and changing their path is a success.