Growing up, it had been Albus’ favourite Muggle movie to watch at Christmas time. His family had always laughed about it because Albus was the one, out of the whole family, that enjoyed the festivities the least. So, they figured, it made sense that he loved the movie about the Who that stole the holiday away completely. Later on, Harry started to understand why Albus liked the movie so much; he felt misunderstood and pushed out by his family - just like the Grinch.