Re: the other three: then how is it that other churches teach differently and back up their claims from the Bible? Again. Ignore what other churches stay and focused solely on the word of God. This applies not just to salvation, but how to worship, give, pray and live like Christ.
How do we reconcile that different people glean different meanings from the Bible? Or are we all supposed to agree with you in order to be correct? NEVER agree with me. Or some Pope, Pastor or Priest. Only trust the Word of God. If I or anyone else teaches a point outside the Word - dispute it.
Hang in there.
Infant baptism: Faith cometh by hearing and hearing by the word of God. If one holds that children believe, that might make it hard to get past the narrow gate, among other things.
Take all the stories of conversion, then assume babies are present. Did babies ask Peter, “What must we do?” There is NO evidence Lydia was married. Did babies “wash Paul’s stripes...” as the Philippian jailer did? Did babies prophesy with Cornelius? Were babies immersed? Plus, verses assert that babies in the womb have not done evil or good. Thus, they are sinless. Another verse asserts that the sin of the father is not imputed to the children. Goodbye. Original sin.
Surely you understand the steadfastness with which these errors are believed. As it is written, “Seeing, they do not perceive; hearing they do not understand.”
Early in 1 Corinthians, Paul condemns three of the four denominations in Corinth. “Did Paul die for your sins?” “Were you baptized into Paul?” The application is, “Did Peter (or Luther) die for your sins? Were you baptized into Peter (or Luther)?” Maybe, we should hunt for the church congregation for which Jesus died for our sins.
So hang in there. Best case scenario, you and I will get to enter by the narrow gate. Even so, it might not be that easy.
So it is to believe (so faith as you wrote), believe, repent, eat of the body of Jesus and endure to the end
Nothing particularly about understanding as key to salvation - so yes, the mentally disabled still can be saved.
infants were of that household. - that is flat out wrong. In those days you had bundles of infants as lots of kids died before the age of 5. To say the householdS had no infants is ignoring the facts on the ground
To say that the people who knew their lost condition didn't want to also save their children is not what a parent would do