If Israel tried that, the disease would spread - fast - into neighboring Arab nations. It would put those neighboring Arab nations - which have chemical weapons and (maybe) biological ones - in the position of having nothing to lose.
Think a few moves ahead. (What would happen if this miracle disease spread to anthrax-armed Iraq?)
Some feel that they could afford to launch this type of strike at Israel because even if Israel were to respond, the Arab nations would survive.
Be that as it may, you object to Israel offensively using these weapons. I don't know if you object to their defensive use as well.
What is your solution to the problem of Arab terrorism?