Suppress speech of white supremacists? Or just protest their policies?

Should progressives suppress speech of white supremacists? Or just protest their policies when they arrive?

I got the email below from Northwest Accountability Project


While American families are grieving and coming to terms with recent mass shootings, including the white supremacist terrorist attack in El Paso, the Freedom Foundation is doubling down on deadly fringe ideology.
The Freedom Foundation has invited white nationalist and Fox News pundit Laura Ingraham to be the keynote speaker at their annual high-dollar fundraising banquet. This celebration is scheduled to take place on September 21 at the Hyatt Regency in Bellevue, WA.
It is with a renewed sense of urgency that we call on the Hyatt Regency Bellevue to refuse to give Ingraham’s hate a platform.
Will you join us in sending a message to Hyatt Regency Bellevue management urging them to cancel the Freedom Foundation’s Laura Ingraham event?