It can’t be stressed enough that there is no difference of religion between Chassid, Litvak and Modern Orthodox. These aren’t “branches of Judaism”. The “Judaism” is the same. The exact same, and is absolutely the same religion.
We all believe in the same essentials. We Daven together and learn each other’s Torah. It is simply an association with a group that emphasizes some aspects (that we all share) more enthusiastically than others (that we all share). People move from one to the other without going through any initiation, and there are degrees all along the way.
In non-essentials there are more differences.