We destroyed their new weapon, among other things. They were certainly more determined and willing to devote resources to stamping us out after that.

[It's said simply, very nonchalant, as if it's not actually more complex than just destroying the Death Star. The Death Star was a big part of it, yes, but the fallout and increase in defections as a result of Alderaan's destruction was also involved. She knows there's no way for Qui-Gon to know what happened, especially if his only source was Obi-Wan, but she's not sure just how in-depth he wants to get with this explanation.]