The doctrine of mutually assured destruction is what keeps countries from launching nukes at each other. In order to have that doctrine in place, we need people in the military who are willing to launch nukes, and that military needs to be firmly under the control of the civilian government.

In that context, was your objection to fire any nuke a personal decision, i.e. you personally wouldn't be comfortable with ending so many lives (who would?) or was it a wider objection, i.e. you feel it's immoral for any military personnel to be willing to launch nukes? If it's the former, then I totally understand. But if it's the latter, would you help me understand how to reconcile that belief with the necessity of mutually assured destruction? They seem to be at odds.