Sorry to say but your husband is wrong. Suicidal thoughts are not a 'normal' thing. If your mom is saying that it is normal for people to have suicidal thoughts, then that means she has them and is telling herself this to keep from thinking maybe she has depression or bipolar. People with bipolar have a 30% chance of death by suicide, which is very high.

I'm sorry your husband is being this way. He needs to understand that not all people with bipolar are bad to their spouses. Not all are violent. Not all are promiscuous. Not all spend money like crazy. Not all have drug or alcohol problems. We all experience this differently.