Why do the Israeli forces threaten to carry out a massive offensive against the Palestinians?

Israeli-Israeli troops have besieged the Palestinian National Authority headquarters in Ramallah, the first military operation in this region since last November. Twenty armed vehicles and jeeps took part in the operation. Israeli forces have been threatening to carry out a massive offensive against the Palestinians after a suicide attack in the Kami crossing that killed six Israelis.
Question: Why do the Israeli forces threaten to carry out a massive offensive against the Palestinians?

Six thousand delegates descended on the U.N.’s New York headquarters Monday for a high-level meeting to reaffirm commitments to women’s rights. The gathering—dubbed Beijing plus Ten—is devoted to assessing the progress made since the Fourth Conference on Women in the Chinese capital in 1995.
Question: When and where was the Fourth Conference on Women held?