Am I overreacting?

Overall everything is great in our relationship. My biggest issue is that he has half naked women on his fb. He says it's old friends and the cuban culture. He says that many cuban women dress provocative like that. He says he's had the FB for many years because

he was single for a long time. I told him in the beginning of the relationship to clean up his social media and that it makes me uncomfortable. I'm I being insecure? Am I overreacting?