Really? I can guarantee you that George W. Bush received just as much, if not more hostility during his 8 years than Obama has/will in his 8; I mean, George W. Bush was brutalized by his opponents, so to say Obama has encountered the most hostility in history, when his predecessor received just as much, is intellectually dishonest. But neither Bush nor Obama have received the most hostility in Presidential history.
Abraham Lincoln (in my opinion) received more hostility than Obama has; after all, the guy did have the whole South (as well as Democrats in the North who refused to secede) hate his guts; and there is that small matter of him being assassinated as well! Going back even farther, during the Presidency’s of John Adams and Thomas Jefferson, these two Founding Father Presidents were ripped to shreds not only by the media, but by clergy of the opposite party. Not only were they being destroyed, but they were being destroyed by very influential people, which the clergy were at the time; there is not much that can reach greater levels of hostility than that!
So does Obama have to deal with hostility? Of course; but to claim that no one has been brutalized by hostility to the extent that he has, is totally ignoring history and missing the point entirely.