Absolutely nothing would change if the Palestinians have a UN membership, it would not make them more unified or have more rights and would not make their quality of life any better. There isn't any strong reasons against it but there isn't such strong reasons for it either.
Thousands protest outlawing of Islamic Movement in Umm al-Fahm in northern Israel (Haaretz)
from the article: Give the Palestinians a state
A Palestinian teen who tried to stab an Israeli woman in the West Bank was run over and shot to death. Her father, imam of the refugee camp where she grew up, says his daughter was 'responding to the occupation.'04:30 28.11.15 | 1 comments