Bipolar Husband

Hi, I don’t even know if my husband of 30 years has bipolar but am obviously searching for some sanity to try and make sense of why he breaks into rages over very trivial things. We have 3 children 26, 23 and 17 who also cop the brunt of his rages and at the time we all feel like we are in a haze of confusion as to what the hell just happened. We all tend to walk on egg shells and the kids now avoid spending time with him. He has lots of really good qualities but they all get wiped out with a 15 minute rage. He is physically very in your face without actually hitting anyone but will in excessive outbursts shove or stand over you intimidating. I feel like I'm not protecting my kids and feel so much disgust towards my husband. He always blames us for his outburst and in some way makes it that we got him to that point due to a build up of our disrespectful behaviour etc I have zero belief in mental health problems and feel that it is just poor behaviour and absolute selfishness