Due to the lack of
historical and archeological evidence, there is no absoluteconsensus till date on what led to the disappearance of
Buddhism from India.However, if we analyze all
the contributing factors and arrange them in achronological order, we would realize that the whole
sequence of events wasinitiated by the Buddhist
monks when they had abandoned the community visitsand concentrated on their own salvation instead of helping
the common peopleand oppressed classes to end
their sufferings. As the lay devotees were ignored,Buddhism started losing the general support from the
community. Subsequently,the Brahmins took advantage of
this situation and deepened the rift between thecommon people and the Buddhist practitioners. They also
manipulated thecontemporary rulers to
withdraw their support from Buddhism and help inreviving the existing Brahmanism. This was followed by the
revival of Hinduismand further decline of
Buddhism
Read this Link http://www.scribd.com/doc/21377094/Disappearance-of-Buddhism-From-India-The-Brahmin-Responsibility