"allowing the arrest and imprisonment of political opponents"
Left party in the UK: doing that
Left party in Germany: we just killed 16 of them
Left party of France: we combine parties to keep the right out
Left party of the soviet union: to the gulags!
Left party of china: Social credit score hits zero too!
Left party of Cuba: what political opponents?
Left party of Venezuela: what political opponent?
Left party of the US: trying to make 'hate speech" an arrestable offence
Whataboutisms about leftist parties the world over doing EXACTLY what your hypothetical implies the right could conceivably do... Based on nothing more than the word 'change'
Ironically which is just basically 'Hitler and Trump both ate apples.'