Things that are barbaric, are uncivilized and brutal. People have different opinions about hunting — for some, it's a way of life, and for others it's barbaric.
You can use the adjective barbaric to describe anything that's needlessly cruel, whether it's the inhumane treatment of people by a barbaric government, or the barbaric way your neighbor treats his dog. Another, milder, definition of barbaric is unsophisticated or uncivilized, like the barbaric behavior of someone who belches loudly in a fancy restaurant. This meaning is echoed in the Greek root barbaros, which means "foreign or rude."