Thats a tough question. She basically says that every Cardassian on Bajor was a target because they were at war. But they really weren't at war. I think that Silaran was right, she showed no remorse or guilt for what she had done. The answer is so muddled, something TNG never did.
They
were at war even though it was undeclared--they were occupied by a hostile force against their will. But the situation was complicated by the fact that the Cardassians brought their civilians into the situation as well as the military. I have absolutely no problem with going after any military targets that present themselves, nor with using guerrilla tactics for said aim.
BUT--I DO have a problem with an unrepentant attitude towards civilian casualties. I have a BIG problem with that. Kira's main target was a military target, yes. Gul Pirak was a legitimate target. Silaran Prin, however, was not. I can see where there could've been battlefield situations where avoiding all civilian casualties might've been impossible, depending on what kind of technologies and techniques were available. Even in conventional military strikes, where all caution is taken to avoid civilian casualties, they happen.
But the PROPER attitude is to mourn them. NOT to take pride in having inflicted pain on noncombatants. NOT to just shrug and say "Oops, oh well." And ESPECIALLY not to blame a victim who was not engaged in any sort of material aid to the enemy war effort (unless Kira's definition of MATERIAL aid is anti-wrinkle patrol?)--especially when you're dealing with an enemy known to oppress its own citizens, and Prin probably didn't have any control over his being in that situation in the first place! And MAYBE was even being used by Pirak as a living shield!
That lack of remorse was incredibly disturbing. It puts her just one tiny step away from those who
deliberately target civilians.
She was right to target Pirak. But she should NEVER have tried to justify the harm she did to Prin.
Thank God for what happens later this season. I won't spoil it in case you've seen it already, but she's going to get a cold, hard slap in the face about her attitudes that will almost cost her BIG time.