The troubled New Jersey man who allegedly rammed his car into an iconic Brooklyn synagogue suffered from mental illness and fixated on converting to Judaism before the crash — as police said Thursday he’ll still face hate crime charges. Dan Sohail, 36, had visited Chabad Lubavitch World Headquarters in Crown Heights several times as he spiraled into increasingly erratic behavior, including an angry confrontation at a Garden State yeshiva where he claimed that “God had sent him,” sources and