Jidders, the verse doesn't predict anything that wasn't happening back then already. People don't typically show each other a lot of respect or love, I mean just get on a bus or the subway, see if anybody talks to you, smiles at you, I mean it happens it just doesn't happen much. Things probably weren't that different back in 1st century Palestine. If Jesus or God or whatever Christian prophet said that meant "21st century Jehovah's Witnesses will hear about and see more atheists" why didn't he/they just say that? Don't read into it, don't make assumptions about what it means or doesn't mean, just read it in and of itself, and then read it in the context of the verses around it.
And as an atheist I gotta tell you: my heart ain't cold, I love me, I love the earth, I love my partner, I love my family, so on and so forth. And I don't do it 'cause God tells me to, I do it because I want to.