“The Law is not multiple choice…”

Was the sin of Adam and Eve passed down to everyone? What can we say to Muslims who emphasize that Ishmael was born before Isaac? How do the Jews obey the Law if they are not offering sacrifices any longer? Why didn’t Jesus appear to more people after His resurrection? Plenty of people could say “Jesus is Lord” and not really have the Holy Spirit, so how does 1 Corinthians 12:3 make sense? What if we enjoy sin? Does that mean we’re not saved? Do we need to do anything to maintain our salvation? Why do some people teach there is a second blessing and that we’re not saved without the gift of tongues?