Way to show you have no understanding of the English language there buddy.

In English, “politics” is usually treated as a singular noun even though it ends in “s” since there is no singular ‘politic’. We use singular verbs with it, so “politics was banned” is standard.

‘Politics’ is different from plurale tantum nouns that are plural by default because they have two parts in one e.g scissors, glasses, pants, etc. This is why we say “Politics is interesting” rather than “Politics are interesting”.

So do some research before you try to correct the fucking police of grammar idiot.