Your statement is incorrectly done, and appears as especially arrogant. You should instaed have written something like that :
"In my opinion, it's cowardly (...)"
This is your opinion indeed, and only your opinion. You don't have to show it here as if were the truth.
Others may disagree with you and are entitled to do it, since it's a matter of circumstances and of the people involved. There is not an only way to handle properly delicate situations. It depends on the people concerned and on the relationship. People who would act differently from you may have good reasons to do it which you can't understand yet.