Les Bleus won 42-27 in Dublin to end Ireland's Grand Slam hopes and move into pole position for the Six Nations title.
But the post-match discussion was dominated by the season-ending knee injury suffered by France captain Dupont, who ruptured an ACL when Ireland forwards Tadhg Beirne and Andrew Porter cleared out a ruck.
Galthie branded the actions of Beirne and Porter "reprehensible" and reported the pair to the match's citing commissioner. No retrospective action was taken, though.
"Without getting myself into trouble here, I just think it's the game unfortunately," said Easterby, whose side are preparing to complete the championship away to Italy on Saturday afternoon.
"No player goes out to intentionally injure another player. For everyone, or for the majority of people watching, looking at it afterwards, everyone felt like it was a rugby incident which was really unfortunate.
"Whatever the insinuations were from different people post-game, it's disappointing because the unfortunate thing is people who don't really understand the game pick up on it."
Dupont - widely regarded as the world's best player - was attempting to steal the ball in the 28th minute when lock Beirne landed on his right leg as prop Porter joined the ruck.
Easterby said the post-match remarks from the French camp created a situation where "people are getting abuse".
"It's just unnecessary and not acceptable," he said. "It happens, we know it happens, but those things could have been avoided had maybe other things been said post-game by certain individuals.
"The French camp have obviously come out pretty strongly and it could have been handled in a better way.
"On the back of that, it's created some unnecessary ill-feeling and it has affected other people in the wider group."
