Under Mubarak, Egypt was too strong for Israel to attack.
Lebanon looked an easier target for Israel.
Egypt may now become like Lebanon.
When might Israel, and the USA, have decided to topple Mubarak?
In March 2010, Debka (which, as a comment below reminds us, may provide disinformation) reported that Mubarak had cancer.
In July 2010 late stage pancreatic cancer was reportedly found in Mubarak. (Mubarak Shaken After Cancer Surgery ...)
But even before then, the USA and Israel may have decided to plot against Egypt.
Israel would like Egypt to be like Lebanon?
In 1948 Israel was at war with Egypt
In 1956: Israel tried to seize the Suez Canal and topple Nasser's regime in Egypt. Israel hoped it might also at the same time grab the West Bank, parts of the Sinai, and parts of Lebanon. (The myth of Israel's strategic genius. )
In 1967: Israel seized the Sinai in Egypt, as well as the West Bank, Golan Heights and Gaza Strip. (The myth of Israel's strategic genius.)
In 1973 Israel was at war with Egypt.
In 1981 President Mubarak came to power and he "has effectively boycotted Israel.
"Egypt's state-controlled newspapers continued to demonize Israel.
"All ties on the bilateral level between Egypt and Israel have been frozen including tourism, commerce, and industry." (Egypt and Israel: A Reversible Peace :: Middle East Quarterly)
Under Mubarak, Egypt became stronger economically and militarily; too strong for Israel to attack.
In 1991, the CIA's Muslim Brotherhood began pressing more strongly for a strict Islamic state.
In 1999, Mubarak visited China.
He signed a joint communique with Chinese President Jiang Zeming on establishing a strategic and cooperative relationship between Egypt and China.
In 2002: Mubarak denounced Israel
Mubarak made a televised speech bitterly condemning Israel and accusing it of using state terrorism to crush the Palestinians.
Mubarak said that following their barbaric and systematic aggression, the Israelis were in the process of destroying evidence of the horrendous crimes perpetrated under the pretext of fighting terrorism.
In 2003: Mubarak opposed the Iraq invasion.
In 2003: Israel protested Egypt's use of unmanned aerial vehicles, drones, to spy on Israeli military facilities.
Israel reportedly threatened to shoot down the drones whose flights violate the peace treaty and prompted increased concern over Egypt's military buildup (Jerusalem Post, December 21, 2003) (Myth and Fact: Egypt's Peace Treaty with Israel)Egypt has purchased Scud missiles from North Korea and is believed to possess chemical weapons (Center for Strategic and International Studies, United Nations (UN) Institute for Disarmament Research). (Myth and Fact: Egypt's Peace Treaty with Israel)
Israel wants the Sinai?
In March 2010, it was reported that Mubarak had cancer.
In April 2010, it was reported that a weekly magazine aiming to link Arab bloggers with politicians and the elderly was launched in Egypt at the initiative of a group backed by US billionaire George Soros. (Soros backs Egypt weekly to give Arab bloggers exposure.)
In April 2010, it was reported by the Jerusalem Post that "Egypt has taken an aggressive stance against Israel, with Foreign Minister Ahmed Aboul Gheit calling Israel an 'enemy' state." - (Egypt warns of Israel-Lebanon escalation)In June 2010, Egypt re-opened the Rafah border with Gaza (Rafah crossing to remain open indefinitely - News)
In August 2010, Egyptian security forces seized a ship loaded with explosives coming from Israel and arrested its owner in Port Said. (Egypt seizes explosives on ship coming from Israel - People's.)In November 2010: Israel tells its citizens to leave Egypt. (Israel tells its citizens to leave Egypt.)
On 20 December 2010 (ISRAEL DESTABILISING EGYPT) we learnt that Egypt arrested members of an Israeli spy ring within its borders.On 1 January 2011, we read that a group calling itself Al-Qaeda (the CIA-Mossad) may be responsible for the seven dead and 24 injured in an attack on a church in Egypt
In January 2011, we read that Egypt's Irrigation Minister has dismissed the possibility that Egypt would supply Israel with water from the Nile. (Egypt and Israel, a souring relationship?)
In January 2011: Mubarak warned Israel against a new Gaza war Israel News.Net)