Yes, there are certain things society has decided are to be frowned upon, that doesn't make a case that anything you happen to suggest is taboo, is actually taboo and when it is voiced by establishment areas, such as newspapers, MPs, political parties, then rhat's not one of those areas.
We have restrictions on this board, should we just remove them is it OK if I were to refer to Jewish people as cockrriaxhes, or call for homosexuality to be banned because all gay people sexuality assault babies?
Do we need to look at free speech, absolutely, now and in the future but it's never been a completely free right. We have exceptionally strong libel laws and that protects the establishment.
Do we have to talk about immigration without people being called racist or rabid, absolutely. Are some who talk about immigration racist or rabid, absolutely. But there is a strong part of the establishment ready willing and able to talk about immigration in terms that certainly do not seem as if it's taboo.
There is too much of tendency from many sides to immediately jump in and ask for people to be fired for comments. At the same time I think that some people deserved to be fired e.g. when a colleague was told that they deserved raping repeatedly by a senior manager.
There is a tendency to use the numpties on one side. stating that they are trying to shut down debate, to in turn deflect from numpties on one's own side. This we had the narrative of the cybernats during the referendum, which used the idiots twittering about traitors and other pish to try and portray one side as trying to shout the other down, whilst ignoring the equally ludicrous shite on the no side, or claiming that was different.
In these days of social media where any twat can twitter, and moron message board, it is always easy to find loons on any side. There are a whole bucket of them who regard any criticism of Islam as some piece of colonialism, and they deserve to ge called out. To argue though that some ding bat students union is creating a taboo when major newspapers tout the other view is just a nonsense.