Bismillah. Alhamdulillahi rabbil-'alamin. Was-Salatu was-Salam 'ala Ashraful Anbiya Sayyidina Muhammad wa 'ala 'Alihi Muhammad.
I want to know if my Shia brothers raise their index finger in Tashahhud in Salah?
If "YES" then what is their evidence?
If "NO" then why?