We will celebrate Passover on the evening that ends Nisan 14. 5. We will be worshipping according to the way God asked us to, as written in the Siddur and Machzor. We will eat kosher because this is what God commanded and the Pharisees concurred. The list goes on and on. The bottom line is that we need to be Torah observant because it is what God commanded and it is the way of those who sit in the seat of Moses.
Much confusion comes from the lack of a teacher.
Many Christians study the Bible and come to conclusions that are not practiced by the Orthodox Jews. They, therefore, conclude that the Jews are wrong and that they are right. Often they start new movements to propigate these revelations. In the end, there is much confusion in the body. Jew study the oral as well as the written law.