You're going to compare past candidate debates to what is said on today's message boards lol? How about you go back and look at the stuff that was published, some it got pretty mean in what was suggested. Some of the cartoons got pretty nasty too. whole books were publish to spew dirt against a candidate or president. Plus they were able to get away with complete lies easier back then. Lincoln was called the devil, an anti-christ and all that too.
I'm talking about degree and frequency. Also, as I mentioned a minute ago, the information age has changed things. Online news, tabloid, websites, blogs, etc.
I created a left-wing hate speech thread that has numerous examples of how people are demonized because they have a different political viewpoint.
What's funny is I was just discussing this issue with an Obama-bot the other day. She actually told me that the "vitriol" directed against Obama is unprecedented. I was trying to give her examples of what happened with Clinton and Bush II, but it didn't go very well. lol . . .