Many parents thought they would be speaking out "against Islam" if they had questioned changes to the school curriculum at Oldknow Academy, a parent has said.
Mr Mohammed Zabar - a parent with a 10-year-old daughter at Oldknow - said the government report brought him "relief" that he had not overreacted after querying decisions made by the school.
Changes such as cancelling Christmas festivities and the teaching of Arabic over other foreign languages, were some of those challenged by Mr Zabar.
After the Clarke report was published, Mr Zabar said: "I think it now comes to a question of who was responsible for what."
More top news
Grant Shapps and Lord Feldman should stand down for their alleged inaction over bullying claims, father of activist who killed himself says.
Scans show there is a 90% chance Tutankhamun's tomb contains a hidden chamber - the last resting place of Queen Nefertiti.
A pregnant woman suffered broken bones and is to undergo surgery after being thrown on to the bonnet of a car in a collision.