I say remove the sentence. Here's why, and I think my idea may be novel.  Yes, some said "I hate Muslims."  However, we need to look at the context.  In the heat of a demonstration regarding a certain limited issue, they shouted "I hate Muslims".  There is no evidence that they hate Muslims generally.  There are many, many Muslims in the world and all of them cannot be put into the little box that represented those involved in the demonstration.  So by putting what they shouted at a demonstration against a relatively limited few in the lead paragraph without proper contextualization, the implication is made that they hate all Muslims, not just those involved in the demonstration, and that would violate various Wiki policies.