I am confused how Edward Kenway can be both a pirate and an Assassin. Weren't pirates all about raping and pillaging, stealing from anyone and everyone, killing anything that got in their path? As for the Assassins', they are about protecting everyone, letting humanity decide their own fate, giving people the choice to choose their own paths and lead their own lives.
I guess I just do not see how those two seemingly contradictory ideologies can both be within one character. Perhaps, Edward Kenway and his pirates only attack Templar pirates? Who knows!