
After the destruction of the 2nd temple, it was less certain which fish/squid was used and the process to make the dye. Still the mitzva of Tzitzis exists, albeit in a less than perfect manner. R’ Gershon Henoch Leiner in…
I submitted this response in the comments. The status was “This comment is awaiting moderation.” Not surprisingly, it wasn’t approved on their site. From Rabbi Akiva Dershowitz and the “Beis Horaah” (https://dinonline.org/2018/08/22/the-reason-why-not-wearing-techeles/): Question: Some people wear “Techeles” Tztitzis. I…