That is such a silly thing to say. Activists, secular or not have a job and that means they have to do their job. Their job is to raise hell, criticize and be objective. We should not see this as a threat. If anything such people can be extremely helpful in pointing out wrongs and evil in our society so that others, richer individuals can come in to actually help.
Also what is Anti Islamic. Taliban also call us anti Islamic, and are making a example out of us with almost constant bombings and killings. So it is right for them to kill us? Isn't debate about our problems and laws which change according to times Islamic. Ever heard of the concept of Ijtehad.
We must not become zealous animals who have no feeling for others. An activist has just died in Bengal and we should convey condolences actually. We must begin to look at liberals more positively. Not only that we should also be open to debate, new ideas and should stop being so iconoclastic.