Naw, Abdullah is basically pro-U.S. (as much as anyone is in that part of the world). The guy you're thinking of is Prince Nayef.
And what's an Islamist hooking up with Gaddafi for? Why would he be taking $300,000 to Syria?
By the way, why would Alamoudi, who spends much of his time here, have the power and wherewithal to arrange an assassination in Saudi?
From Yossef Bodansky, "Bin Laden: The Man Who Declared War on America", 160ff:
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Three distinct factions within the House of al-Saud were fighting for the Saudi throne in 1995-96: 1) the increasingly isolated Prince Abdallah; 2) the younger-generation Sudairis led by Prince Bandar and enjoying the support of his father, Prince Sultan; 3) the Salman-Nayif group, led by two other full brothers of King Fahd. . .
In December 1995, once the gravity of King Fahd's debilitation had been ascertained, the king's Sudairi brothers--Sultan, Salman, and Nayif--tried to form a coalition to bolster their joint position. . .to undermine the prospects of King Saud's faction. . .
The issue of Islamist terrorism as a factor in the succession struggle was first brought up in this context. Prince Sultan also asked the ulema to support his effort to dismiss Prince Abdallah from the position of head of the National Guard because of the November 1995 bombing in Riyadh, an inside job. . .
This was an audacious if not desperate move by Prince Sultan. Prince Abdallah is a devout Islamist. . .He is also a staunch supporter of pan-Arab and pan-Islamic causes, including worldwide jihads, and moreover is anti-Western and mistrustful of the United States. The Abdallah faction is convinced that the United States is conspiring to empower Prince Bandar bin Sultan, the Saudi ambassador to Washington. . .The official ulema is therefore a natural aly of Prince Abdallah. Members of the ulema not only refused to support Prince Sultan, citing his close ties to the United States as the reason for his unsuitability for the throne, but also reported the conspiracy to Prince Abdallah.
In fact, the Abdallah faction felt shamed by the November 1995 Islamist terrorist attack against the National Guard in Riyadh and was increasingly worried by Salman-Nayif's widely publicized struggle against Islamic terrorism and the political gains that resulted. . .
Salvation came from Damascus. Prince Abdallah has unique and close relations with Damascus, in particular the Assad clan, the family of Syria's president Hafiz al-Assad. In early spring 1996 some members of Prince Abdallah's inner circle developed a plan to bring about the downfall of the Sudairis. Syrian intelligence would run a series of low-level anti-American "terrorist operations" that would be attributed to an assortment of Islamist organizations. The conspirators concluded that such a wave of terrorism would shame the Sudairis because they are responsible for national security. . .
There was little benevolence in President Assad's support for anti-Riyadh terrorism. Beyond repeated and profound conflicts with King Fahd Riyadh over relations with Tehran and Baghdad and the extent of Iranian influence in the Persian Gulf, Damascus was receiving special aid from Prince Abdallah. Beginning in the early 1990s, Abdallah had arranged for the tacit transfer of a few billion American dollars from the Saudi treasury for construction of a huge chemical warfare plant in Aleppo, in northern Syria; acquistion of ballistic missiles from North Korea and the People's Republic of China; and construction of a vast system of underground tunnels to ensure the safety of these surface-to-surface missiles and their chemical warheads. . .