Lina Hashem is Communications Specialist at Islamic Relief USA. The last time IRUSA board member Dr. Hamdy Radwan saw all three of the young Muslims killed Feb. 10 in Chapel Hill, N.C., they were helping others. Deah Barakat was selling toothbrushes at the masjid to raise funds for dental products for Syrian refugees. He wasn’t yet quite comfortable in the role of fundraiser. “You don’t have to pay for it,” Radwan heard him say. “Just make dua for the people.” And the last time he saw sisters Yusor and Razan Abu-Salha, they were at an Islamic Relief USA fundraising dinner, pausing for a photo with their proud father. Artistic Razan…