Crusaders split over how to confront, cope with Xanadu Friday, May 7, 2004 By ALEX NUSSBAUM STAFF WRITER TARIQ ZEHAWI / THE RECORDEnvironmentalists are split on Xanadu. Hackensack Riverkeeper "Captain Bill" Sheehan, above, supports the marshes for Xanadu trade-off. Left photo, the Sierra Club's Jeff Tittel, left, has questions. Fourteen months ago, environmentalists were popping champagne corks.The deal to build a $1.3 billion consumer playground around Continental Arena also meant that 600 acres of wetlands would be permanently preserved. After a decade of fighting, a developer would get to build, but local activists had also saved a marsh in the...