1. According to the Chasam Sofer, that is the Halacha. If you wish to understand the depth and the breadth of the Chasam Sofer’s Teshuvah I would suggest that you ask someone local to got through it with you. In all events, the accepted approach is that a Jew is a Jew regardless of what they do. Of course, they will have to give an accounting in the Spiritual Realms for every single thing that they did (as does every Jew). However, it is important to point out that there is a Halachic concept called “Tinok Shenishba,” which in general refers to a Jew who has no real Jewish knowledge. Such a Jew is judged differently from Jews who are knowledgeable and choose to sin. According to the contemporary Poskim, most Jews today fall into the category of “Tinok Shenishba”.

    Best wishes from the Team