How did chris benoit kill his family?

Chris Benoit suffocated his family to death and then hunt himself but honestly I don’t think that they deserve to die they were happy poeole with good life’s so I don’t thimmm they deserved to die cause they were Amazing people and then the father and husband of that family had to end it all j Feel like he should not have done that cause it was a very bad thing to Maureen you family and the people you lovr