Many are taking certain things too literally and not understanding they are based on God's foreknowledge, and that though He foreknows all outcomes, He doesn't judge or declare what anyone is until the end, when they have "proven" to be what He foreknew they would be. Bible calls it the proving of our faith, if we indeed are in Him and remain in Him until the end. In the meantime everyone has the opportunity to prove themselves faithful or prove themselves otherwise. Even a false brethren or tare has the opportunity to be changed from what they are, and thankfully some are changed by the grace of God.. And vice versa, some start out well but become false. These are the reasons why Jesus gave us all those warnings, which when heeded, will either help keep us on the right path or get those onto it who aren't. We need to rightly divide the scriptures, by the Holy Spirit.