Malik has written that the turning point in his relationship with the left came with the Salman Rushdie affair. Much of his political campaigning over the past decade has been in defence of free speech, secularism and scientific rationalism. Malik was one of the first left-wing critics of multiculturalism, has controversially opposed restrictions on hate speech, supported open door policies on immigration, opposed the notion of animal rights in a series of debates with Peter Singer and Richard Ryder, and spoken out in defence of animal experimentation.