So the sacred underwear and tithes are required to get into highest heaven.
What is the secret handshake for?
The sacred garments are symbols of covenants made with God. We are a covenant making and a covenant keeping people. We are the children of the God of Israel. Tithing is a commandment of God, and yes, necessary for all of those to whom the law is given.
The "secret handshake" is a symbol of a covenant made with God. Keeping the covenant is what is essential, not the symbol.