Deen Was Always Islam- Sabbath
Are you sure that is the basis? From Ghamidi sahabs tafsir of ayaat 7:163-166 seem to imply it wasn’t a bidah. Rather that sabbath was actually specific to the Jews and they weren’t allowed to hunt. Sure the day may have been changed but even the concept doesn’t seem to remain nowadays
If it was specific to Jews because they were the chosen people- then why isn’t it the same for bani Ismael ?