Should I break up with my boyfriend over this?

I just exploded on my boyfriend because he accused me of lying about my dad being abusive. Long story short, my dad was mentally and physically abusive and had a drinking problem all my life. That DOES not mean I don't live my dad and I have forgiven him and hope to have a good relationship in the present. I constantly contact my dad just to talk or to see how he is doing. Unfortunately, loving and forgiving him doesn't mean he has changed. My dad has been the same way since I was a kid and some things a lot of people wouldn't forgive. What made me ultimately forgive my dad is an understanding that the abuse was a result of him suffering from alcoholism and I TRIED to help my dad when I could, I offered rehab and support when he returned but he didn't take it. I respect my dad in a lot of areas but sugar coating who he was all my life is not something I'm gonna do. My boyfriend had an abusive relationship with his mom and I never told him he should or shouldn't feel any animosity about it I just validated the that whatever happened hurt him. Somehow it came up in conversation and I ended up telling my boyfriend about the story of my dad pulling a gun out on me while I was asleep. My dad was staying in my house at the time and came back drunk and arguing with me because the front door was locked. I hadn't locked him out, I was just asleep due to having to work and my siblings (who also lived with me) we're home and awake. But he had called me multiple times and I missed the calls because I was sleep. He came in drunk, arguing and calling me a bitch and then when I told him get out he pulled a gun out. My boyfriend kept trying to say I was overly sensitive in general and that it must have happened differently before finally just blurting out that he thought I was lying. The fact that he accused me of lying... I just couldn't take it because I was opening up about such a sensitive memory and he just completely invalidated me. What is his problem?

Should I break up with my boyfriend over this?
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