Do you agree every able person who elected their gov. is culpable for their wars if they fail to oppose them?

If members of a democracy fail to try and non-violently / politically oppose and protest (a freedom they wouldn't have under a dictatorship, thus validating their freedom and ability - if they wanted to - to eradicate injustice by their government) against unjust policies (with the aim of their utmost ability to eradicate them), are they guilty of neglecting a political duty they have as democratic officers that have elected their government and pay taxes, partake in the economy etc, and are thus in the same boat of accountability as the government itself? Do we not have a duty as members of a democracy to politically participate in the struggle for world justice (if the injustices we hope to eradicate are being acted out by the government we elected and taxpay of course)?