Interesting article here on a schoolboy interviewed by the police about terrorism because he wore a 'Free Palestine' badge.Wear 'Free Palestine' badge = likely terrorist supporter. Pro-BDS = antisemitic. This is obviously ridiculous. Which is not to deny there are anti-semites amongst such people, of course. Similarly, some think those pointing to at least *some* significant Western responsibility for rise of Islamic terrorism = Islamism (or at least support or apologetics for it).
On the other side, suggest there's a significant problem re Islamism in the UK (and I do think that, in fact) and you will likely be deemed Islamophobic. You will also be labelled Islamophobic if you defend the right to free speech of someone like Maryam Namazie. Or if you believe Islam is a root cause of terrorist violence (which I do).
In each case, there's an attempt to stifle and silence dissent with a shaming accusation of bigotry. For of course, the one thing us lefty liberals can't bear to be accused of is bigotry. 'Anti-semite!', 'Islamophobe!' Gets us every time. We start self-censoring for fear of being thought bigoted.