There are two sides to every story.
There are reasons for his behavior and for yours.
Relationships are hard. Period.
We all bring the bad and the good to the table.
I dont think you should live in fear of your husbands response about not attending your class. This, to me, is not a healthy dynamic.
I also think you should continue to improve yourself by learning from this class. Why did you start the class?
He should not have called you worthless and should keep the brutal words off the table. No excuses there.
Learning to fight fairly is not an easy task to undertake. It takes time and patience and two people who are willing to come to the table with respect and a wanting to work through the issues. Just an opinion.
I dont know the whole dynamic and never will. I just know that if you two are willing and want a healthy marriage it can happen.