"The issues is that it is part of an extremely worrying trend for "anti-terror" initiatives to close down, or marginalise, critical discussion, dissent and any unconventional or minority views."
Evidence?
"No need to assume a lack of regard here for the anguish of parents (Muslim or otherwise) who are frightened for their children."
The frivolous nature of the comments made such a lack of regard pretty plain. They were along the lines that might be taken in mocking fundamentalists for worrying that reading Harry Potter would turn their children into devil-worshippers.
"I'm rather scared for the families of the many "false positives" who will be "detected" and labelled under anti-terrorism initiatives, especially in Muslim communities."
Un-evidenced (and conveniently in the future) strawman. Meanwhile you have still said nothing sympathetic about Muslim parents worried about their children being put into danger by radicalisation.