Telegram's CEO arrest is likely over Israel
--Israeli data hacked
--Leaked on Telegram
--Arrest is likely a response to a refusal to censor
Quotes from Anadolu from Aug 21st:
‘The leaks are likely the most severe in Israel’s history -- an unprecedented looting of gigabytes upon gigabytes of information of all sorts,’ says Israeli daily
"The leaked data has appeared on platforms like Telegram, prompting a series of takedown attempts by Israeli authorities. However, Telegram’s limited moderation policies have complicated these efforts."
Source:
https://www.aa.com.tr/en/middle-east/anti-israel-hackers-have-released-troves-of-classified-data-haaretz/3308994
It's most likely several things at once. This just being one of them.