Am I too extreme for telling my husband this?

I come from a different culture than my husband, before him and I got married I explained to him that he needs to get rid of any pictures with him and his past girlfriends out of respect for me and my family. We don’t date in our culture and it would be inappropriate for our future kids to come across pictures of their parents being intimate with someone else from the past. He agreed but every now and then I’d find old pictures of him and his exes through out old boxes in the new house we bought together. Do I have the right to be upset after I asked him numerous times to make sure there aren’t any old memories?

Edit: we’ve been together for nearly 5 years and we have 2 kids.

Edit: I don’t think his intentions are bad, (he’s not keeping pics in a creepy way) and that’s why I’m not upset about seeing pics with his past. He’s too lazy to go through million of pictures I think. Pictures blended with family memories and military letters. But is that a good enough excuse?