Here is why: most of the issues you described when Tusk didn't give in were national and specific to Poland. ACTA is sort of a popular kid on the global political block; emphasis being on global. It's a new kid in school if you will, and one that everyone wants to take a stab at. This is bandwagon politics that caters to scaring the public with a gun, only to apologise and whack them over the head with a stick nevertheless.

You and I probably agree that the outcome is good overall, but be wary of the political song and dance. Stay vigilant is my motto.