[ttiokjbnhjjillp]

Tough luck! Even if Khidr or any Jinn Sahabi/Tabi'i show up, people are not going to pay heed.

how do you know?

maybe some people will not listen. but then maybe some people WILL listen.

When they not even willing to accept established proofs from Qur'an and Sunnah.

everyone claims their aqeedah is based on quran and sunnah. the problem is the way different groups interpret the quran and sunnah. if jinns from the salaf or hazrat khidr (as) were to clarify some matters then it would make a big difference.