Fanatical

enthusiastic obsessed passionate zealous biased devoted extreme immoderate infatuated opinionated prejudiced radical burning dogmatic fervent feverish fiery frenzied impulsive mad partial raving single-minded stubborn unruly violent wild willful bigoted bugged credulous domineering erratic headstrong impassioned incorrigible monomaniacal narrow-minded nuts for obsessive partisan possessed rabid turned on visionary contumacious