The Anglican Dean of Sydney, Phillip Jensen, has described Islam as "false" and attacked the religion for the rise of Islamic State.

"It's time to face the truth that Islam itself is part to blame," Dean Jensen wrote last week in his blog titled "From the Dean".

Anglican Dean of Sydney Phillip Jensen with the Duke and Duchess of Cambridge on their visit to Sydney. Credit:Toby Zema

"Islam is false."

Despite the possibly inflammatory comments, the Sydney Anglican Church has stood behind the 70-year-old minister's comments.