Not so. The law is against murder. Not killing. In fact, capital punishment was supported by Yahweh as a resolution for murder.
Similarly, in matters of national security, a response is required.
First, Israel exist where it does, because that is the historic homeland of the Jew.
Second, they exist there because the U.N. approved the land for a Jewish state.
Third, Israel has conquered the land in wars waged against Israel.
Forth, Israel has never engaged in war for the purpose of land expansion, but rather land expansion has been a natural result of winning wars.
Reasons to support Israel are not restricted to religious reasons. I also support them because they have as much a right to exist there, as anywhere else.
You are operating from a world view, that it this point, I don't even understand. For example, you ask the question why can't devout Jews live next door to christian Palestinians without a fuss.... Well... they CAN... and they DO... so I don't understand the purpose of the question.
You then discus Palestinians as if they are external to Jews. Jews ARE the palestinians. Palestine is the entire area of ancient Israel. Many of the Jews that live there, are of families and ancestry that have lived in the land of Palestine since the time of Roman occupation.
In fact, there are no "Palestinians". Palestine was simply a made up name, given to the area called Israel, specifically by the Romans to piss off the Jews. Which goes back again to my point, Palestinians ARE the Jews.
Last of all, you act as if the Jews are just randomly attacking to take land. Again, I don't even know how one would believe such a fantasy. Only after Israel was attacked by Eqypt did they take the Gaza Strip. Only after Syria attacked did they take the Golan Heights.
Thus far, and if you can prove me wrong, by all means, I have yet to see a single time in which Israel has taken land without being provoked to do so by acts of war.