What do you mean they are not justifiable? Creating a Jew-free territory is what's not justifiable. Here's how the settlements are justifiable: Jordan captured the West Bank and East Jerusalem in 1948 and kicked out every single Jew. Then Jordan annexed those territories and refused to allow Jews to enter, even to visit their most holy site. In 1967, Jordan attacked again and lost control over the territories. Jews moved back in and reclaimed their properties. You think if you kick Jews out of their homes for 19 years, those lands are supposed to remain Jew-free from that point on? You should be ashamed for supporting the notion of ethnically cleansing Jews from entire swaths of land.
Fear of rioting, disorder at Temple Mount prompt restrictions on Muslim worshiper (Haaretz)
from the article: Settlements threaten American Jews' connection with Israel