That news is wrong because there is no rule a Pope can't apologize.
...According to the Roman Catholic Church, the Bishop of Rome IS infallible - but only in specific cases. The current furore over remarks made by the pontiff about Islam does not fall into this category.
Papal infallibility only comes into play with issues of faith that concern the whole Church. It doesn't apply when the Pope is expressing a personal opinion or, in this case, quoting from a historical text...
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