They haven't. People are just as good, kind, generous, helpful, nasty, intolerant and brutish as they always were.
What has changed is that we now live in a world with near instant communications, 24 hour TV and news (and that's a lot of minutes which need to be filled) with editors desperately trying to select what might be important from the run-of-the-mill stuff.
So now you get bombarded with reports of this, that an the other at all times of the day and night, and that alters your perception.