User blog comment:Miskos3/Fairy Tail Chapter 486: The Fourth Guest, Review/@comment-4507125-20160524082154/@comment-7418318-20160524095806

Many of those Dragons were on the side of the Humans and far from being heartless or tyrants.

Or would you call Igneel, Grandeeney, Metallicana, Skiadrum, Weisslogia and Atlas Flame heartless tyrants?

Actually half of the Dragons from 400 years ago even went to war with their own kind to stop mankind from being considered a non-sentient food-source.

Come to think of it the only named Dragon that was ever confirmed to be anti-Human was Zirconis. All the others are either pro-Human or unknown. Remember that F-Rogue controlled the seven Dragons who came through the Eclipse Gate. Even Atlas Flame initially fought against them until Natsu managed to break the mind-manipulation and return him to his true personality.