hes mad over a Christmas Bag..

So my fiancee and I were organizing some things today because we're in the process of moving and we were throwing away a few things. he started looking through the Christmas gifts so we can throw away some bags. he came across a present and looked at the tagged and saw it was a gift given to our DD because it had her middle name and my last name. he freaked out and said that's the most bogus "shit" he's seen and ofcourse it was someone from my family. he asked me who's handwriting it was and I scared to answer because I didn't want to call out a name but I can tell it was my dad. so he is upset because when DD was born my bf wasn't there for me. I didn't hit him up when I gave birth and I gave my DD my last name. My dad is really prideful that I did that but nothing seemed prideful for me because it hurted me at the time that my fiancee and I split up. it's just bad memories. after she was born he stepped up and got a job and tried winning me back. he did alot to be there for us. I told him if he showed me he was a great father we would change her last name. she is now 1 and half years old and we've talked about it but he has to save up the money to change it. I guess seeing the bag made him feel like my dad was mocking him in a way? my mom would of not allowed my dad to write that cuz she knows it would hurt my daughter's dad and I guess she's more "considerate" do you think he's exaggerating to be upset? he said he can't wait to change DD last name and walked away. **I didn't allow him to change it in the beginning because I wanted to trust that he would be there for DD. hes been a great dad even if things weren't to work out I would trust him with our kid. we've just been saving for our bills and rent so we haven't had extra money for much