Is it normal modern technology is making people anti social?

I disagree with the premise. Sure, iPhones, iPods, and other handhelds with or without headphones give people an excuse not to communicate with their immediate environment, but many of those people are communicating/socializing via those devices. Likewise, before the age of the iPod, believe or not, Walkmans existed. As did newspapers and magazines - resources more commonly accessed nowadays via handhelds. People have been intentionally distracted and antisocial for ages.

My experience isn't that people are less social, it's that how we socialize is being redefined. That and we're getting older and distancing ourselves from the norms we grew up with and their subsequent transitional norms. Face-to-face, the younger generation has always been more socially awkward than their elder counterparts, but that's more a function of age than era.