That's all very well and true, but it's disrespectful given the scenario.

People would be up in arms would students have walked out on Obama. They'd be tarnished as 'racists' etc..

Their actions lend credence to the notion that Universities are becoming heavily politicized, unwilling to listen to a variety of ideas, and focused on promoting a specific version of morality.

You can now expect to have students 'walk out' on speakers of all kinds, at all times for  various reasons.

It's fanning the flames of the pop culture wars.