Agreed!
Nukes would never be used. It would be cheaper to walk into a crowded Tel Aviv street after the sabbath ends and drop a vial of ebola or other viral compound on the ground.
After the first report of an outbreak, the UN would insist Israel close its borders and not let any flights or shipping leave the country. The wall Israel has built would enable the Palestinians to be isolated from the virus.
As the virus spreads, the Arab world will go to the UN and insist Israel is responsible for creating a killer virus and that God is punishing them for it. European leaders and others would be slow to send in supplies and medical teams with only the US responding quickly.
Within a week, Israel would be in panic mode. The hospitals would be overflowing, the infrastructure unable to sustain the casualties. It would be during this time that Syria, Iran, Lebanon and Egypt launch a massive attack.
How is that for a scenario?