I'm torn on this. I find the tweets quite crass, i don't buy the "it was 10 years ago" argument due to his age. Having said that it isn't really worth stripping him of a job, he doesn't seem to have done anything similar recently. A genuine apology and a bit of humble pie would suffice in normal circumstances.
However, Disney are arguably the biggest kid focussed media company in existence with a bit of a whiter than white approach, and the comments were about paedophilia and rape in a very tricky climate. They did the right thing for them, if it had been another publisher he might have got away with it.