We need focused talking points, e.g. the fact that the NSA and other governments vacuum up all your data, and that TextSecure represents the first step toward a future in which it's very difficult for governments to do that. Whereas with Telegram, it's just as easy for them to access your conversations as it is for them to bypass SSL. Governments can and will do so. That's what users are concerned about; that's what they care about. Telegram has no defense against that argument due to their protocol's inherent vulnerability to this form of attack. Therefore it's the single most important point for to stress to any potential user.
Yet it's getting lost in the noise. Actually, I haven't seen it mentioned very much at all. Someone should do a writeup calling attention to it.