There are basic five states which you can be in relating to the essentials of any belief system, whether it be Christianity, Islam, or even atheism:
You can subscribe to a belief system without knowing the details of the belief system. This is not a good state to be in. There are many who identify themselves as Christian, Muslim, Atheist, or whatever without having personally investigated what they believe. Until recently (and maybe still so today), most Americans identified themselves as Christians, but the majority pick that belief system as the default (“I believe Jesus was a good man, and I’m not a Muslim, Buddhist, or pagan, so I guess I’m a Christian.”), not knowing what Christianity is all about.
You can reject a belief system without knowing the details of the belief system. This is also not a good state to be in. These are those who deny a belief system is true without having investigated what that system teaches. Reasons for denial are subjective: “It doesn’t seem right to me.”, “Almost nobody believes that.”, “Look at how those people behave!”, “I’ve always been told they’re wrong.”, etc.
You can subscribe to a belief system knowing the essential details of the belief system. This is much better than ignorant acceptance or rejection. It shows you realize the dangers of believing something without any evidence. You may still come to a wrong conclusion on the matter due to incomplete and/or biased investigation, but you are closer to finding out the truth than blind acceptance or rejection.
You can reject a belief system knowing the essential details of the belief system. This is also much better than ignorant rejection or acceptance. Again, you may come to a wrong conclusion on the matter due to incomplete and/or biased investigation, but you are closer to finding out the truth than blind acceptance or rejection.
You can accept some essential parts of belief system and reject others, and you can combine parts of one belief system with another. This is also a form of ignorance and self-deception: calling yourself a believer in something, but not really believing it. You cannot say you are a Christian, a follower of Jesus Christ, if you don’t believe the things Jesus said. That is like saying, “I hate hamburgers, but love cheeseburgers. But I prefer my cheeseburgers without cheese.” You can have your cheeseburger without ketchup, lettuce, or onions, but you can’t have it without cheese. Cheese is essential to the cheeseburger. And Christ is essential to Christianity.
The further away you are from ignorance, the less likely there will be compromise, and the closer you will be to the truth.