Nuclear war does not result in mutual destruction ...that's a lie ... if you kill the enemy first ,he can't kill you after.
If you wipe out his country of the face of the earth how is going to attack you after ?
Have you heard of submarines? They are the insurance that there will be a mutually assured destruction. How much time you think it takes to know that an attack has happen? You do not know a nuclear nations capability to know who attacked, it is a complete BS about the thing where you attack first then the enemy will not attack, what are a samurai?
You need to attack him with all you got before he attacks you , you got to do it with a stealth attack.
What the hell? You think launching all of the nukes launches instantly? Unless they prepared an complete assault then they can do it. Another BS, if you exhaust your resource in one attack then you will be vulnerable to other countries attack.
Why should i use icbm's to launch an attack ?
You can just put 1000 tsar bombs on freight trains and send them to the enemies capital and major cities ...you have to find a way to bribe the border guards...and make them think your smuggling drugs or something like that...
Plans like this they never think of ... they think always long distance attacks ...
ICBM is the most effective because if you are planning a nuclear holocaust then you might as well spend the least resource as much as possible. Why the fuck would you risk a nuke train when you are country? What are you a Bond villain? You can't easily smuggle shit that has a nuclear on its tag which means you can't put it in a public transport. Why would a border guard accept a bribe when he knows it will cost a destruction.
Also did you know that when thousands of nukes are detonated even in just one country, the effect will be felt around the world? Did you know that it will cause nuclear winter that will affect the surrounding places of the fall out? There is a reason why they are not launching these bombs, the nuclear researchers have proven the effects in the long term after a nuclear fall out. Read about the Chernobyl so you can understand my point. The point of going to war is to claim the resources of the target country, now if you nuke that or sneak a nuke train like in Hollywood then you essentially destroyed the objective which is the resources.
Read this:
https://en.m.wikipedia.org/wiki/Chernobyl_disaster