No, this is not anywhere near a normal attitude about death! This is not something you’d even admit to if you felt these detached feelings, either, especially to say it to your new bride.
Does his family own the funeral home? Has he been raised with some skewed attitude about death being great for them because it brings them business?

Why does he think his feelings are normal and you are being over sensitive to react?
I agree with Bill that it’s best to calmly discuss this issue with him to learn about where and why he has this attitude. The other name-calling is also abusive and most likely will escalate.
I suggest talking to a marriage counselor or even clergy (especially about the death attitude).
I never heard anyone say they felt like they wouldn’t care if anyone died.