Her solidarity and commitment to humanitarian causes didn’t make everyone happy. There were some people in power who were frightened by a woman in her position giving prestige and legitimacy to different causes, especially the plight of Palestinian refugees, an issue she was actually about to take on.
The Princess also happened to have a relation with a Muslim Arab man, Dodi Al-Fayed, a relation which was likely to result in marriage. Her fiancé conveniently died with her in the car crash.
Certain people in power would not have liked the image of the Princess with the Arab husband and perhaps a half Arab child. They would have liked even less to see this family on a pro-Palestinian manifestation in front of cheering crowds. Diana’s involvement surely would have boosted the morale and the status of the global Palestinian movement enormously.
The British establishment began to fear Diana after the divorce from Prince Charles. She had access to secrets they didn’t want to leak to the public. They felt she was unpredictable, out of control. For example, she was planning to criticize the government over foreign arms sales.
After the 31 of August 1997 they didn’t have to worry any more. The father of Dodi, Mohamed Al-Fayed, sensed right from the start that the couple had been murdered. He knew what he was talking about. He said: “I believe the relationship between Princess Diana and Dodi Al-Fayed displeased the authorities.”
Dodis father has also suggested that the government was annoyed that Diana became very actively involved in the campaign against land mines. “The UK arms sales industry is huge, it's one of the biggest three in the world”, he said. “The investigation into Diana's death showed she was preparing to denounce British complicity in the sale of weapons to countries that do not respect human rights.”
There were obviously shady elements within the British government that wanted the Princess of Wales eliminated. But there were other elements as well, which are known to despise international law and not to hesitate in dealing swiftly with their enemies wherever they are.