I have met Arnold but would NEVER approach the man in an interview kinda way without first setting something up, even if informally, and definitely never when the guy's chugging free finger sandwiches into his piehole. You're just asking for a brush off.
Like it or not, these kind of celebrities grow accustomed to behaving towards others in a way they would not have pre-fame and wealth. Arnie believes he is better than others. Never mind the fact that he, too, shall rot away after he, too, dies. Leave a legacy? What a laugh. His memory will outlive most, sure, but in time it will also disappear as if it all meant nothing. Because it DID mean nothing.
Dave should know better. Still, I feel for the guy. His fandom got the best of him at that moment.