I absolutely agree with the last point. "They call me MISTER Tibbs" is a line about reinforcement. When he says "I am a police officer", that is the impacting one, the one that declares his status but screams "You idiots!". I'm not sure if he says "I'm" or "I Am" but it certainly feels like "I Am." And it's absolutely no fuzzy paean to civil rights. It is a film about ultimately finding respect because Lord knows, they are not friends by the end of it. There is such self-loathing on Gillespie's part when he opens up to Tibbs about his life over a bottle of whiskey, and the same is not reciprocated. Perhaps I undersold the screenplay in my earlier post, but the heated charge that comes from the scenes seem just as much product of Steiger and Poitier as the script. Some of that is due from reading Pictures at a Revolution, but that's a very good point about it being a small movie shot in color whereas otherwise would be in Black & White, and low and behold the bold new manner of color cinematography that Haskel Wexler pioneered for this film in shooting African-American skin would go overlooked.In the Heat of the Night, as I've probably said here before, was a very unlucky movie (or as unlucky as an Oscar best picture winner can be). Any other year in that '61-'68 stretch, it would have been viewed as a refreshingly low-key alternative to the costume-and-bombast batch that voters were otherwise voting for almost automatically. (It also, as an aside, serves as a bridge to the "even small movies are now shot in color" era -- five years earlier, it would have been a black-and-white film, as likely would have succeeding best picture winners like Midnight Cowboy, The French Connection, Cuckoo's Nest and Rocky) It's a mistake to remember In the Heat of the Night as some warm/fuzzy paean to the civil rights era. It's a relatively tough film for its time (a friend of mine who's black says the moment Poitier slapped the rich white guy resonated with him more than anything he'd ever seen in a movie till then), and it's also got a comic/ironic perspective. Though "They call me MISTER Tibbs" is the line most often quoted, the moment that sticks out for me is "I'm a police officer" -- that told us the filmmakers had a sense of humor that was going to keep the film out of Stanley Kramer territory.
In the Heat of the Night may have "robbed" The Graduate & Bonnie and Clyde, but I don't know anyone who considers it in the lower rung of winners that decade.