Deir Yassin was simply the most publicized massacre. I trust you’ve done enough research to know there are more.

I happily quote people when their words and deeds are consistent. Here, for example, is Ben Gurion admitting they did not plan to abide by partition but expected to exploit it to take even more:

“Does the establishment of a Jewish state [in only part of Palestine] advance or retard the conversion of this country into a Jewish country? My assumption (which is why I am a fervent proponent of a state, even though it is now linked to partition) is that a Jewish state on only part of the land is not the end but the beginning.... This is because this increase in possession is of consequence not only in itself, but because through it we increase our strength, and every increase in strength helps in the possession of the land as a whole. The establishment of a state, even if only on a portion of the land, is the maximal reinforcement of our strength at the present time and a powerful boost to our historical endeavors to liberate the entire country.” —Ben Gurion