Since when have we reached the point where you aren't allowed to annoy or offend people?
Well, at least as far back as 1999, as reported here. When a professor cannot use the word "niggardly" in his classroom talking about Chaucer because an ignorant student refuses to be educated as to the meaning of that word, we've gone well past the point.
I view this as no different than a bunch of church-ladies picketing to stop Andrew Dice Clay, or someone protesting outside of a place that sells bacon because they disagree with eating bacon -- it's the tyranny of a very vocal minority who feels it is their right to control what others do.
The difference is that there are active steps being taken to keep people who are PREDICTED to talk about things that are "offensive" from being able to talk at all. Church ladies protesting outside are fine, until they hinder people who want to attend the Clay show. If they link arms and block access, they've crossed the line.
And even this example I think crosses the line. We recently had a "public forum" with an "open mic" relating to the feelings of minorities on campus. I think it had stemmed from the stuff where a basketball team threatened to strike if the provost of their university didn't resign, or some such.
One poor white sot actually spoke at the "public meeting" with an "open mic". He was branded a racist and was run through the public ringer for daring to speak when only minorities were allowed to. He had at least one apology published in the student newspaper, and I think it made the city paper as well.
I believe what he said was actually supportive of the minorities, but the fact he was white was the only thing they heard. It was offensive for him to speak in support of them.
So -- "the rights and freedoms they grew up enjoying should be curtailed such that they only extend to people who agree with them" doesn't cover it anymore. "Agree with me and be the same minority as I am" is closer to the truth.