Can we agree at least two of the following three people must be wrong? How do we determine which (if any) of them is correct?

Person 1 says the God of the Bible is a real entity who lives outside space and time and can't be tested by science. Person 2 says the the Hindu triumvirate are real entities who live outside space and time and can't be tested by science. Person 3 says Eight Buddhist Dharmapala are real entities who live...

All religions are Man-made bullshit....But you knew that. If a God exists why do we have so many of them?