Note that these statements are all made by celebrities whose positions essentially give them a bullhorn for advertising their hatred.
The difference between these two lists is that most of the threats listed by Maddow were individuals outside townhalls or making anonymous phone calls who had no platform to shout from the housetops. Only a handful of people (if that) were aware of their vitriol and hatred and could have been stirred up by it. Nobody was making rap videos or staging plays that urged the murder of Obama. These individuals didn't have audiences in the millions that they could stir up to violence. They also didn't have George Soros-backed organizations fomenting violence in the streets with paid thugs.