It wasn't that Albus' forgiveness was out of reach, rather, he was tired. He too was a man, and capable of his own weaknesses. Anger being one of them.
"With many witches losing their magic, I feel as if it's only moments before large scale things will begin to happen. Surely, you've heard about young Ms. Abbott's dissapearance? It is definitely the work of Rodolphus."
Fawkes left his perch to land on the desk, he peered at Snape in innane greeting.