McCains rallies and his liability

As of late, the McCain campaigns gave been experiencing enhanced hostility at their rallies. One could argue tat if the script were transposed and presented before the public and asked which political socio-economic group did these statements come from. One would get varied responses and some, myself included, are disturbed and would assume some radical group. These comments have been repudiated, but is that enough? It would seem that these people could be removed and it would not be in violation of their free speech because a political party is a private organization and allowing such comments creates implied support of the ideals contained by the candidate. Surely, McCain does not call for Obama's assassination and some of his supporters do. Allowing this at the rallies is supporting it. The host of a party is liable for the actions of his or her guests its no different here and seems appalling. This rhetoric will undoubtedly make the campaign look bad, but the campaign combating this will help their cause. McCain is right that in such a gathering of so many the weirdos and radicals will come out, but it does not mean they couldn't be removed or their comments be disbanded. this has begun as of late