It has much to do with Telegrams intention to stand against demands from Russian mafia-alike "government" (https://www.rferl.org/a/russia-fines-telegram-app-e

It has much to do with Telegrams intention to stand against demands from Russian mafia-alike "government" (https://www.rferl.org/a/russia-fines-telegram-app-encryption-key/28797424.html https://www.rferl.org/a/russia-fines-telegram-app-encryption...) and being one of the most used app in Iran during unsuccessful riots, till finally banned and then un-banned after riots were crushed.