If it exists it is possible to verify objectively, otherwise it's subjective... Or made up
Now the argument could always be made that we have not found god yet, so people can keep looking if they think God is out there (they subjectivity feel God's presence, or god was revealed to them in some spiritual way) ... But as of now, if someone says they have found god, this is not a rational thing and it should be taken with a grain of salt!