I'm not sure what point you're trying to make here. You start by agreeing that telegram is simply not private. Then you move on to implying that it must be, because the CEO got arrested?
How does that change the fact that it is, by your own assessment, not private?
To answer your question, the answer from my perspective is quite simple. Noncompliance. If telegram had complied to local laws, like the others have and continue to do, he would not have gotten in trouble.
Pretty sure they said something like that after the referendum, which is coming up to 10 years ago at this point