If it's based off of feelings and viewpoints, it is opinion unless proven otherwise, and it has not been proven otherwise. Believe me, your post is very opinionated. Just note the use of the color white, often used to describe purity and goodness, the opposite of black, being used to describe Hellion's sabotage.
Now, what if the TC leaders did perfectly in this merge negotiation? That would not have changed the end result. Hellion himself has said that Phantoms members were actually somewhat interested in the merge, so in essence he acted alone. Nearly got rimmed as a result, but lucky for him he got a city out of range of Cohort amidst allies.
Now, what if TC never offered a merge, or Hellion had denied their offer? Well, the end result would still probably be similar, except Phantoms may have still been around, and TC would still have too many inactives.
So really, can you blame TC leaders for this, something they could never have predicted, while just trying to be nice? It takes a jerk to throw a kind offer back in their face through this sabotage, although if anything, he may have given TC a boon. He could have always just said no, then pushed hard for a NAP to avoid getting hit too much while attempting to move into HAF (aka safe) territory if he really wanted to fight TC.