Many of them assuring that jain religion and Lord mahaveer is fake especially South peoples they are just making ugly videoes about jains in YouTube

With a proof I want people to believe that jain religion is not fake and Lord mahaveera is also not fake please help me how can I do these.I just want to know the gap between 23 and 24 thirthankar its Lord pashwanath follower and Lord mahaveera is differe