Kuwait-born Abdullah Albadri, 34, was tackled by armed police after he leapt up an embassy fence armed with two 4-inch knives last May.
Jurors were told he had tried to get into the grounds in Kensington, west London, to “exact revenge” for the killing of children in Gaza.
On Friday, a jury at the Old Bailey, which deliberated for nearly 14 hours, found him guilty of preparation of terrorist acts and possession of two bladed articles.
Albadri first entered the UK in August 2021, arriving at Dover in a small boat from France, the court heard.
He applied for permission to remain in Britain but did not attend an interview with the Home Office.
The defendant then left the country but returned on a small boat from France in April 2025 and tried to begin the process of applying for permission to stay in the UK, the court heard.
But his application for asylum was later rejected.
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