Was I being offensive?

I’m Ashkenazi Jewish, but I don’t practice. I do celebrate the “fun” holidays though. On an online forum (thread about holidays) I talked about how I have Passover parties but with bread. Not an actual Seder though, and I never used the term Seder. I did say I was Jewish. Someone who also said they’re Jewish replied its offensive to call it a Passover celebration because it involves bread. I was told I need to educate myself on Jewish traditions or don’t appropriate things I don’t understand. I know I’m not celebrating Passover correctly, and I only celebrate the fun holidays just for the dinner and socialization. I mean you can’t appropriate your own culture?