Police said there was no information that the suspect was not acting alone.
"The continued occupation in Palestine/Israel is 21st-century slavery and should be abolished immediately," wrote the Presbyterian Church's Stated Clerk, Rev. Dr. J. Herbert Nelson, II.
After joining, Ramic allegedly attended an Islamic State training camp where he received weapons and physical training and fired an AK-47, the DOJ said.
'It feels so personal that people have very quickly stepped forward to support the initiative,' said federation vice president Stacy Gordon-Funk.
At least 100 people are feared dead in Kentucky after a swarm of tornadoes tore a 200-mile path through the US Midwest and South.
Kentucky Governor Andy Beshear said the collection of tornadoes was the most destructive in the state's history.