Well, the Qur'an says so
This 8 minute video covers the origin of the "Apes & Swines" stories in Islam and handily dismantles them. The ministry of Acts17 Apologetics has its website here, which is full of useful information for discussing the reality of Jesus with Atheists and other people, as well as with Muslims.
Shabir Ally, the Quran, and the Village of the Apes and Swine: Part 1 (Anthony Rogers)
In the Quran, Allah declares that various law-breakers were transformed into apes and pigs. Since Muhammad was known for plagiarizing stories from Jews and Christians, we may wonder where Muhammad heard fables about Allah miraculously disfiguring people. In "Shabir Ally, the Quran, and the Village of the Apes and Swine," Anthony Rogers investigates.