From the Journal Star article:
Amber Mohr, museum administrator and curator of the Great Plains Art Museum, said the reason the cemeteries are typically exclusively Czech is a matter of the historical record.
"About 50 percent of Czechs who immigrated (to America) had no religious affiliation," she said. "They were agnostic and called themselves ‘free thinkers.' Because of this, Catholics and Protestants refused to bury them in their cemeteries. So the Czechs had their own.
The exhibit runs until April 18th at the Great Plains Art Museum, 1155 Q St., Lincoln NE. Go here for hours and directions.