Is Bernie Sanders correct about the planned Ann Coulter speech at UC Berkeley?

The Berkeley College Republicans and the Young America’s Foundation have sued UC Berkeley for cancelling Ann Coulter’s planned speech at the campus due to fear of violence:

https://www.nytimes.com/2017/04/24/us/ann-coulter-university-of-california-berkeley.html?_r=0

Bernie Sanders says that shutting her down is a sign of intellectual weakness, that she should be confronted intellectually, not booed and shut down:

http://www.huffingtonpost.com/entry/bernie-sanders-ann-coulter-berkeley_us_58fb7006e4b00fa7de14bc3d

As much as I dislike Ann Coulter, I always support free speech when I can. I would much rather Ann Coulter be challenged than be shut down.