Many christians don’t have a faith of their own. They do things because that’s how it’s done in their church or because their pastor said so and this is their basis for judging what is right or wrong. So to them whatever is different from doctrine as they know it in their church is wrong. If you don’t have a reason why you do something then the truth is you are just following people. I heard this from pastor Chris Segun Onayinka: “If you have not found something you can die for then you have not really started living.” He said ” find a cause worth dying for and live for it”.
    You can never be a true follower if you are not convinced of the leader’s vision and cause. In christianity there is one leader called Lord. Bible calls him the head i.e source.Eph 1:22. We are his body i.e his people, his church, greek- ecclesia- called out ones. This is what he talked about in Matt 16:18. His church, his doctrine. When it comes to his doctrines, it never changes, no review. See Heb 13:8-10
Hebrews  13:8 “Jesus Christ the same yesterday, and to day, and for ever. ” 13:9 “Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.”
   “Be not carried about” means don’t be easily swayed, infact, don’t be swayed at all. What is “divers and strange doctrines”? It is anything that is different from grace. It is a good thing that the heart be established on grace. Grace is the doctrine. Don’t expect it to change because Jesus Christ is the same yesterday, today and forever- he never changes.
    That is why we teach grace and nothing else. “It is a good thing for the heart to be established…” A good understanding of grace will give you a strong, effective Christianity.
      You should be grounded in issues of doctrines. You should be able to answer certain pertinent questions. Examples of such questions will be;
— Can a christian be saved without being baptized in water?
— Did Jesus leave a commandment to eat the communion?
— Is a christian supposed to pay tithe?
— Is the tithe payer allowed to eat the tithe for any reason?
   You’ll do yourself some good to start studying God’s word and becoming established  on grace so that you stop getting carried about with diverse and strange doctrine. So that you stop being a child. A baby christian is one who is not sure of what he/she believes. Ephesians  4:14 “That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;”
Let us go on to perfection(maturity) Heb 6:1. Let’s not remain babes. Hebrews 5:
5:12 “For when for the time ye ought to be teachers, ye have need that one teach you again which be the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat.”
5:13 “For every one that useth milk is unskilful in the word of righteousness: for he is a babe.” 
5:14 “But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.”
    Have a fruitful day. Of a truth Jesus is Lord! We win!