How does this sound?
Just like treatments for head-lice that soon become ineffective, because the lice grow immune, we Israelis have become so accustomed to terrorist attacks we have become immune to fearing them on a daily basis. The more attacks there are, the less effective they become in terrorizing us.

Terrorist attacks have become just another of those things that can kill you in less than pleasant ways, like traffic accidents, cancer, Alzheimer’s, (missiles from Iraq…) to name but a few. The danger is very real, but normal, well-adjusted people don’t spend their lives fearing them.

No? Well, just a suggestion.