If someone wants to become Christian all they have to do is say "i found Jesus" and they are welcomed and praised. You can then go on and study the faith further if you want and tighten up your faith by becoming more knowledgable and you'll be left alone and encouraged by other Christians while you do it.

It doesn't work like this in Islam. Sure Muslims will slobber all over any new Muslim and welcome them in, but that's where the warmth stops. If any new Muslim wants to go further into his faith and really immerse himself, there are a lot of conditions attached to this in order to be accepted.

No new Muslim can study his religion freely without first learning Arabic (an enormous time consuming task) or studying in an Arabic country. Any Muslim speaking about theology is required to learn Arabic or he will be mocked. He is also required to go study in an Arabic country like Saudi Arabia to learn aqida. (This is obviously not practical for all new Muslims or even born Muslims)

"How can you read the the books of Ibn Taymiyyah if you don't know Arabic?"

Yet one can read the writings of the church fathers without being required to learn Latin. He isn't going to be mocked for needing English translations.

Any Muslim holding suspicious political beliefs (failing to recognize Iran as the greatest evil to Muslims, for example) will be shamed by other Muslims and viewed as a deviant until he affirms or retracts them. Any new Muslim who befriends a Deobandi, Ash'ari etc will be shunned and shamed until he frees himself from them. And vice versa.

In Islam new Muslims are essentially required to attach themselves to a sect from the onset to be accepted.

Christianity seems a lot more catered to an individuals private freedom and inner space. You can go at your own pace and there are no extra demands placed on you if you want to study the faith and become closer to God.