I'm aware of the death threat, and if that had any impact on Borg, he honestly needed to grow some thicker skin. Athletes of Borg's prowess sometimes receive death threats; sadly a part of life as a great one. Almost a decade earlier, on the verge of breaking one of sports greatest records, Hank Aaron was getting death threats every week. It didn't stop him from breaking the record by a considerable margin. And after the Seles tragedy, people getting on the court is no joke; didn't really seem to phase Federer during perhaps the most pivotal moment of his career.
Yes, Borg was still playing exceptional tennis in 1982 - in exhibitions. It's impossible to equate that with Grand Slam play.
I want to also mention Borg's Davis Cup Streak of
33 matches, which still stands, if I'm not mistaken. He won his first Davis Match at 15 in 1972! See many of his accomplishments here:
http://en.wikipedia.org/wiki/Björn_Borg
As to your post, are you comparing the 2009 FO incident to what happened to Borg at the 1981 US Open when there were security personnel placed around the edge of the court and when Borg was checking in with Lennart B. (coach) as to how the security was in that chaotic environment? (TW Poster Borgforever filled me in on some of these details, but I had heard about the death threat years ago). Those details get lost over time and then folks, especially some fans of his rivals, play up the "Borg quit" because he couldn't play anymore stuff. No comparison. It's not NEARLY the same, if that's what you are contending. There you had a wild fan. As far as "thick skin", where was Federer's "thick skin" when he was about to lose to Nadal at the 2008 Wimbledon Final and he said "Hawkeye" is wrong and it's "killing me" and then he said "it's too dark"? So, let's not go overboard with the "thin skin/thick skin" stuff. Borg faced matches when they were throwing things on the court at him (coins) and his expression barely changed. He NEVER broke his racquet on the Court, shouted at officials, or screamed when he lost points. The same cannot be said of Federer or just about any other player. So, he was definitely not a "thin skinned player", but you are talking about his response to the 1981 US Open Death Threat after he beat Connors handily in the semifinal (probably a Connors or McEnroe fan, or just some plain nutjob, who knows?)
Also, to say he couldn't win at the slams by 1982 is a huge stretch. He may not have wanted to play a full schedule, but that's different than him not being capable of winning Slams. He wanted to only focus on the Slams for at least a while, BUT he
did not want to play a full schedule and a lot of small tournaments at the same time, at least for a while. Those tourneys had lost their appeal for him.
Anyway, as I noted it wasn't just that. The players of today, are
much more insulated from the public than they were at that time, plus Borg had the "groupie" effect and a lot of people mobbing him in hotels, etc, unlike any other player I can think of. It was just quite a different scene. The chaos around him was unlike what any other player has faced, including Federer, who has a much more cushioned environment around him, due to the He was the FIRST truly international tennis star. Per Borg, he CHANGED the Game more than ANYONE before him and probably anyone SINCE then. He revolutionized pro tennis, period, from endorsement money, to bringing in "casual fans", etc. . He did not have the insulation from the public that exists in the modern tennis scene and non of the advantages that that the Tour has instituted over these years for its top players. It was "rougher" back then, and not as "cushy" you could say.
Also, as to Aaron, yes that was impressive, but quite a different. There, you have a whole team around you, but regardless, I agree Aaron faced a lot of threats, which was impressive. Anyway, Borg made the choice to leave the Game, and I think there was a lot of "blowback" from tennis folks that were frankly angry at him for having the "nerve" to say to the Tour: goodbye, if you won't even play a reduced schedule for a while, I'm done and will leave on my terms. There was a "backlash" of sorts when Borg quit so abruptly and shock. Then many speculated that he was just a "quitter", which is so unfair to him, given all that he gave to the Game, and due to all the sacrifices he made from the time he was a teenager, playing TONS of official and unofficial events that helped grow the Game to heights it had never reached before. McEnroe said "he caused such CHAOS". You may have already watched these, but for some other posters who haven't, check these clips out that describe what I am talking about.
As Becker says, he was one of the first POP stars in international sports. See these Video Segments on Borg at Wimbledon to give you a sense of that:
http://video.yahoo.com/watch/1694076/5681964 (hear Becker on Borg)
http://video.yahoo.com/watch/1694418/5686082 (Borg as pop idol and watch Becker talk about Borg becoming a star)
Also See Borg on Winning:
http://www.youtube.com/watch?v=lLVoUl4OVGc
1982 Borg (Thanks TW Poster Borgforever):
http://www.youtube.com/watch?v=Kger-33YtiY