haroon moghul : tsarnaev found guilty in terrorist bombing of boston marathon . how to prevent future such acts by young muslims ?
pew reports by 2050 , one in 4 will be muslim . many equate terror with islam . not true , but we should grasp what causes radicalization .
moghul : muslims see their community besieged around world , some think solution is violence . they must be shown other way to help .