Right Not To Be Offended?

We have just seen a play close in Birmingham because Sikh protesters used violence, and the forces of law and government lacked the will to defend free speech, which if it is to mean anything means allowing people to offend others.

I think Mark Steyn has it right when (discussing mainly USA examples) he says:

The elevation of the right not to be offended into the bedrock principle of democratic society will, in the end, tear it apart.

If this is a consequence of the creation of a multicultural society, it is a heavy price to pay.