Assuming fission/fussion, a 10 MT weapon would create a fireball about 3 miles across and would cause burns to exposed skin out to about 20 miles. Blast damage to non-hardened structures out to about 10 miles. Fallout doesn't stop at national boundaries.
To get a 10 MT yield would require roughly a 4,000kg bomb - that takes a big rocket to lift (about the size of Redstone???). I think the largest yield weapon that the US had produced until last year was only about 9 MT.
Israel is about 8,500 square miles and has nearly 8 million inhabitants - some 20% of Arab decent. Is that a viable target?
Anyway, that wasn't the thread, was it?