A lot of people are scared because the moment you question what the israeli entity is doing, you are labelled 'anti-semitic', and all sorts of repercussions follow. This silencing has been going on for decades. Read the account by the late great professor Tony Martin (I think he returned from his time as a Professor in the USA, (where he was hounded and harassed for some ten years ) to Trinidad). he wrote a book about his experiences, The Jewish Onslaught. And there are some videos where he has given talks about his experiences.