Owners shut down business after receiving torrent of responses...

Memories Pizza -- the first Indiana business to declare it would refuse LGBT business -- got blasted on the Internet and by phone, but the owner says there's been a huge misunderstanding ... sorta.

Kevin O’Connor tells TMZ he's had to temporarily close his business after he told a reporter he would refuse to cater a gay wedding under Indiana's new Religious Freedom Restoration Act. O'Connor says he was immediately flooded by threatening phone calls, and social media postings.

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