The way I see it the Caeliar are responsible for the creation of the Borg. The humans were captured and held against their will, they had every right to try and escape. If someone kidnapped you and told you that you would be held captive in their house until the day of your death..wouldn't you try to leave? Even if it meant hurting or killing them? Seriously, who wouldn't?
Now whether the other races in the galaxy will see it that way is a whole other box of self sealed stem bolts.