Because it is much easier to do more damage (disinformation, propaganda etc) with today's technology than ever before. Radio could do more damage than newspapers, TV could do more damage than radio, internet can do way more damage than TV...

Someone with a 500$ laptop, internet connection and a handful of social media accounts can do a level of damage and cause pain that would be impossible 3-4 decades ago.

Technology might advance, but people are still people. Greed, stupidity, ego, jingoism...these don't change no matter how much tech advances