By virtue of their geographic location, generational trauma, and religious dynamic, they are locked into a fortress mentality that isn't representative of a typical western country.
Or put another way, one can compare the politics of the UK and New zealand, Germany and the USA, France and Australia, but none of these would be comparable to Israel.
Most nations have a web of security partnerships or the geography to weather any attack on their nation, or both, Israel has neither and as such will go on happy crusades from time to time.