That's just how religion works..The burden of proof has nothing to do with the majority opinion. If 100,000 people told me unicorns exist, I'd still ask for evidence. I understand this might not be what you're saying, just liked to clear things up.
You either believe or you do not believe.
My experience is that persons who starts to question stuff, like you did right there ends up not believing..
Also, if you ask a question and want the answer to be something, it's hard to believe you're wrong. Specially when it's not any evidence of the opposite.
 
				 
 
		 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 . In Romans 2:14-16 it says "For when Gentiles [bush tribes as you say], who do not have the law, by nature do what the law requires, they are a law to themselves, even though they do not have the law it is written on their hearts, while their conscience also bears witness, and their conflicting thoughts accuse or even excuse them. On the day when God will judge the secrets of human hearts."  God will judge a man based on what has been revealed to him, not what has not been revealed to him, so it just depends on them following what God has asked them to do.
. In Romans 2:14-16 it says "For when Gentiles [bush tribes as you say], who do not have the law, by nature do what the law requires, they are a law to themselves, even though they do not have the law it is written on their hearts, while their conscience also bears witness, and their conflicting thoughts accuse or even excuse them. On the day when God will judge the secrets of human hearts."  God will judge a man based on what has been revealed to him, not what has not been revealed to him, so it just depends on them following what God has asked them to do.