lord brahma, vishnu and mahesh (shiva) are all a part of the holy trinity. one is creator, other is nurturer and the third is destroyer. all three are symbolic of the basic necessity of life and the cycle of life. it is foolish to say that one is supreme and the other is not. in the puranas there are numerous instances where all three say that the other one is supreme. this shows their humility. they are powerful yet grounded then why can't their followers do the same and remain humble.