My issue is that the same rule is not applied when Mahathir Mohammed makes a tweet supporting genocide.
This is not a case of tweeter going around there system to check on posts to bring down but it depends on the users who make report on the post or posts. The posts have to be reported and not just a report but a series of report for tweeter to move to check the post. Tweeter has it rules and regulations for guide on people to post and if violated via report, then the rules will be applied. Also every other platforms including our noble forum (bitcointalk.org) has a button or a place where report is made poyor activated by clicking on it. For the forum here, this is an example
As about the Nigerian President post, it was reported severally by people who didn't like the idea in the post and tweeter has to do a check on the post and the rules has to be considered. Likewise every other media platforms, they have rules and regulations as guide to users.