Not because of Hitler, but over copyright issues
Hundreds of 'Downfall' memes on YouTube are no more. The classic
spoof revolved around a scene from the 2004 motion picture Downfall
(Der Untergang), which depicted the last days of Adolf Hitler and his
henchmen in Berlin.
The memes dealt with all sorts of issues, ranging from Apple products,
through current political events to Kanye West's downright daft
on-stage antics at the MTV Video Music Awards. While some of them were
quite funny, the thrill wore off quickly, as the same concept was
chewed over hundreds of times, much like plots in sitcoms or reality
shows.
On several occasions human rights campaigners warned that the memes
were insensitive in that they used a mass murderer for cheap laughs,
thus trivializing the crimes of his genocidal regime. However, in the
end the memes were not pulled because of poor taste, but because of
copyright infringement. The makers of the memes argued that they were
using the footage for parody, making it fair game under the "fair use"
doctrine.
However, since the music and movie industry is trying to mimic the
Third Reich by controlling the media and limiting free speech, the
arguments fell on deaf ears.
More
here.