I don't understand why people think criticism of Muslims or Islam is being silenced.
It is not always overt. It is things like people coming on the MN threads and throwing words like "Islamaphobic" at every one trying to discuss the issue without any evidence of anti-Muslim bigotry having been seem.
It is things like people, instead of arguing with the issues which people are discussing, trying to twist what people are saying so that they can accuse them (on the basis of what they haven't said) of anti-Muslim bigotry, racism or the like.
It is things like people popping on to threads to tell people they are too ignorant to discuss Islam, even when it is one of the most important issue facing us and one which anyone concerned for their children's future needs to be considering.
It is things like Paul Nuttall being shouted down on BBC Leaders Debate for saying we need to name and be able to talk about Islamist extremism and being told (via the twisting method above) by Caroline Lucas that in saying this he is saying all Muslims were responsible for the Manchester Arena bombing, when he said no such thing.
It is things like Andy Burnham slurring everyone on the UK Against Hate march in Manchester on 11th June as EDL-types, and on being told they were not EDL-types but gay people, people of all ethnicities, Muslims, ex-Muslims etc, saying "I don't care".
It is the way the march yesterday of thousands of football fans in London against Islamist extremism was not coverered by most of the media, and the few which did called it an EDL march (despite the fact that there was an actual EDL march happening at the same time elsewhere in London
)
It is the way if I started a thread on MN saying I thought homosexuality should be illegal, I would pretty quickly be told where to go and the thread would be deleted. But we don't talk publicly about the fact that many Muslims hold exactly this view.
It is the way anyone who tries to talk publicly about how we as a society deal with Islam gets called, sooner or later, a bigot and racist and accused of being far-right, when the only "far-right" views they have are that they are concerned about the effects Islam is having on our society.