Then again, I don't have a clue what to do about the people that try to intentionally hurt others to cause terror...
And who are convinced that they will go to heaven for doing so.
This in my opinion is the most important difference between now and then. Most communists were rational people when it came to preserving their own lives. They were no different from capitalists when it came to self-preservation. And that is why the cold war stayed cold and why after WWII no nuclear bomb was ever used again (used on the enemy that is, outside of nuclear tests).
Radical Islam is fundamentally (no pun intended...) different in that regard and it is extremely dangerous that a lot of people refuse to or just genuinly are unable to fully grasp that fact. The clergy in Iran might actually decide that a nuclear attack on Israel is worthwile despite the high probability of Iran being wiped out as a consequence. Because dead Jews are a good thing in itself, dead Iranians not too bad because they are going to heaven, and isn't the apocalypse necessary to bring back the 12th Imam anyway?
Yes, they mean it. No, they would not change their mind if we invite them over for brunch.
And here a parallel to pre WWII times come to mind. The nazis had never had any inhibition to openly talk about their race theories, antisemitism and how Europe should be ruled in the future. Yet Chamberlain et al somehow covinced themselves that they could have 'peace in our time' and told the British to 'go home and sleep quietly in their beds'.
I've heard and read a lot of this during the last 15 years. It's changing ever so slowly after recent events. About time.