What does "empathy" mean?

Members of the Tree of Life Synagogue in Pittsburgh, Pennsylvania, feel great empathy with Muslim members of the mosque in Christchurch, New Zealand, where at least 50 people were shot recently while worshipping. The synagogue in Pittsburgh lost 11 of its own members in a shooting last October.

"We're unfortunately part of a club that nobody wants to be part of, and we wanted to reach out to New Zealand in the same way everyone reached out to us," said Tree of Life president Sam Schachner. The synagogue's GoFundMe page hopes to raise $100,000 to "show them that love is stronger than hate."