The Marlin and H&R/NEF forums were both closed down. I used to visit the H&R forum quite a bit. It was closed because of liability, but didn't have anything to do with Muslims (that I know of). Some asshat was posting descriptions of how he tested his NEF to near failure by loading higher and higher pressures. Eventually the action was popping open when he fired it (fired it remotely). There were other asshats recommending unsafe loads to people that were just getting into reloading. There were also increasing numbers of trolls, including anti's and actual hunters who were just ethics-less and liked to stir the pot with their (sometimes illegal) stories. All in all I think Marlin/H&R just got fed up with the BS and didn't want to assign someone to admin the board. There was a Yahoo group for the handi-rifle.
It's a shame really because there were some good people on the H&R board.
J