.... , , Reviewer RothbBrd (inset) hBs some incisive comments on the show "Silly JBck" Bnd wonders Bbout the mBkers' "creBtivity, " By MURRAY t('ROT~-BARD~ , One of the most striking "cultural" 'success stories in recent years is the film Billy Jack. Produced two years ago and poorly distributed by Warner Bros., the film nevertheless became an under ground hit, grossing no more than $30 million throughout the country; it is now being re-distributed with a big publicity campaig...