Please list them.
1. The notion that mountainous terrain provides any kind of strategic advantage in this day and age -- especially in a geographic area as small as Israel -- is ridiculous. Aerial warfare has rendered this kind of "mountain barrier" concept obsolete, and modern high-tech (and nuclear) warfare has made a ground assault on Israel futile. For someone in Israel to complain about the close proximity of foreign enemies in this context is sort of like a guy with an arsenal capable of supplying a U.S. Army division complaining that his next-door neighbor has a biq knife.
2. Comparisons to the situation in Czechoslovakia are aimed at raising serious warnings to the outside world, but they are pointless and silly. Czechoslovakia was created out of the remnants of World War I and was never really a unified country for any extended period of time. In fact, one of the rationales used by western countries to support its creation in 1918 was their aim at diminishing the influence of ethnic Germans in this region (mostly in the area known as Bohemia) by diluting them in a larger population group comprised of Czechs and Slovaks. The unsettled union of the two distinct ethnic groups was formally severed in 1993.
3. The reaction of many western countries to Germany's predations in Czechoslovakia in the late 1930s wasn't based on a delusional policy of appeasement. Rather, it was based on: (a) a candid assessment of their own limited military capability to deal with Germany's military might, and (b) their desire to let Germany and the Soviet Union vie for dominance in Eastern Europe with little or no intervention by France, Great Britain, etc. If "the West" were to adopt the same stance towards Israel today, it would be based primarily on our candid assessment that a small, unsustainable country in the Middle East isn't worth saving.
4. The greatest threat to Israel's existence is not Arabs -- it's Israel itself (through radical secularization and loss of religious/cultural identity). For example . . . abortionists in Israel kill more Jews in a typical month than Arab terrorists have killed in all of modern Israel's history.