Even if we assume that you are correct by claiming that fruitarian diet was that killed Steve Jobs, you cannot extrapolate that fruits are unhealthy from the fact that diet of only fruits is harmful.
A diet of only water is deadly != water is not healthy.
You can be in deny, that's not my problem. All the facts are open there for you to interpret, if you think the cancer in his digestive tract wasn't because of his life-long diet, that's a problem for you. I hope you don't go to the same lengths as him to try to prove you are right (and find out too late that you are wrong).
sugar -- refined sugar (crystaly power, or syrup)
sugar -- as part of a fruit/cane/beet
The first is much more dangerous than the latter. The latter in many cases --when eaten with the fruit that it was produced in -- is very healthy!