This is what Pavel @Durov replied to them:

1. You are confusing public channels with private and group chats.
2. "responded by saying that its channels are the private territory..." - private/group chats, not channels.
3. "mocking calls that ISIS channels on Telegram be removed", these were NOT the calls I mocked.
4. "is such a surprising reversal of course" - no such reversal as previous comments were about PRIVATE chats.
5. "Telegram was made generally available in the fall of this year" It's available since 2013. Proofread!