Ummm, no. You didn't. You did supply a lot of obfuscation to what was a clear question. Are the tribals saved due to ignorance or not? Yes or no?
There have been Scripture passages which have been posted to deal with that already. If you choose to ignore them, there is no point in posting them further.
You are not ignorant. What are YOU going to do about Jesus?
If the tribals salvation is of such concern to you, go tell them about Jesus yourself, so they are no longer ignorant. Or support some missionary agency which works with them. There are several which are worthy of support as they are working to translate Scripture into languages which have none yet.
Wycliffe Bible Translators comes to mind.
http://www.wycliffe.org/