Because this truly benefits the entire race and every related individual.
They had at first found such a course of action incomprehensible, until they learned the specifics of this Red Dragon's origins:
This Red Dragon, his father was none other than the famed 'Flower of Dragon Island', Attilicia, and at his side was a 'well-reared and gleaming' Silver Dragon, his sister Tania.
Therefore, it could be proven that this Red Dragon, despite his Pride, Greed, brutality, and his murderous ways, was actually a 'good dragon'?
The Dwarves who reached this conclusion immediately showed a constipated expression, finding it hard to imagine how such an oddity could emerge among the Chromatic Dragons.
But just as Blue Star also has the saying, 'A gentleman may be deceived by being upright,' the present Dwarves similarly deduced a conclusion that was equally hair-pulling: