I see where he's coming from with that.
He went after Joe Budden and MGK the way he did because it was coming from a personal place. With Tyler, he was a fan of his work, and for him to call his song trash (even if it was) it brought out the petty, angry side of Eminem because they hung out and formed a bond. Then Tyler turns around and starts trashing him. Calling him a fakkit was unmotivated and just proved everybody who's went after him for using the word right.
Honestly, if Eminem is going to bleep the word out, he's better off retiring it. He was able to get away with it back when he was the guy everybody loved to hate, but now that he's pushing 50, the shock value is gone and it's just another example of him being behind the times.
What's funny is, Em would probably sound better on Tyler's beats than a lot of this trash he picks out.