Nothing is going to protect fully from nuke war. It's about taking steps to survive. What other personal steps do anything?Well if you think a bomb shelter would protect you from the negative impacts of a world war or nuclear war, you are an idiot. If you think the only step “concerned” people would take would be constructing a bomb shelter far removed from any coasts, strategic target or any place that has ever been bombed in recorded history, again you are an idiot.
Measuring levels of concern by the number of people building bomb shelters, and not those using logic and reason, is idiotic.
Somehow equating supporting Ukraine with a higher risk of nuke war and thus causing higher concern isn't logical. Favoring appeasement is worse as it encourages further aggression until that is confronted.