strange that all past Prophets were rejected, but the coming one will be accepted on first hand! Hilarious!
If you are thinking that Mahdi will be a prophet you are mistaken.
The title Mahdi is from the word HUDA. The Guided one. He is not a prophet.
Quit often when people dont understand things, they start laughing and call them hilarious.
Consensus of scholars is that one should follow him but if a muslim does not follow him or join his causes it will not be a sin.