Pro-Soleimani messaging floods Twitter following general's drone strike
cyberscoop.com
cyberscoop.com
Any rational person knows Soleimani was a dangerous person whose orders caused significant instability and death throughout a large swath of Asia (minor and major). Any rational person also knows that that alone does not make his assassination legal. (It also does not make that assassination prudent or effective, but that's a different discussion.) When a senior leader within a nation is murdered by agents of a foreign government without even the decency of declaring war first, of course there will be calls for revenge. I'd expect no different from my fellow Americans if Pence or Esper or Milley had been targeted in a similar way. Heck, I'd expect worse. One cannot conclude that there's an organized propaganda effort until the "natural" level of such sentiment is accounted for.
I don't see why whether there was a declaration of war or not should matter if people want revenge. However, since you brought it up, Trump did tweet this all-caps tirade: https://twitter.com/realdonaldtrump/status/10212345256266096... . I remember being very concerned that a president would post something like that. Anyhow, you have to admit that it shows how Trump wasn't keeping retaliatory plans hidden from Iran.
"Twitter accounts claiming to be located in Iran and throughout the Middle East pushed out many thousands of tweets under a handful of hashtags, such as #HardRevenge and #DeathToAmerica", well, Iran has population of 81 mln people.
I can easily see 'many thousands of tweets' by legit real supporters of Iran regime, considering that Soleimani was considered a war hero. Honestly, for a country with 81 mln population, 'many thousands' does not sound like a lot. It's not even 'tens of thousands'.
Also, I can't find a recent source, but Iran censors their people's internet, including Twitter and Facebook. This article from 2013 says they lifted the ban, but then shortly after re-banned it. So it's not even clear to me if legitimate users can even use Twitter. https://mashable.com/2013/09/16/twitter-facebook-iran/
Removing 5K accounts for a nation of 81M people is like removing 15-20K accounts for the US, so it is basically nothing, IMO. Consider that back in 2017, there was an article stating that "As many as 48 million Twitter accounts aren’t people, says study" [0]. Until we speak about millions of accounts, these 4,779 are nothing in terms of influencing public opinion. I will happily sell a Brooklyn bridge to any authoritarian leader who believes that 5K fake twitter bots that are not followed by real people can make a difference.
[0] https://www.cnbc.com/2017/03/10/nearly-48-million-twitter-ac...