If you've had many encounters with Zimbabweans, you've run into people who do think he is a hero. This would be perplexing to the average HNer who has only read (accurate!) stories of authoritarianism, human rights violations, and hyperinflation.
1. Once a hero, always a hero. Africans struggle to turn on liberation movement leaders. We feel we owe them our freedom. For some people, liberation movement leaders can never do anything wrong. This leads to my point two.
2. Some families have always associated themselves with liberation movements. It maybe the father joined the party or a son, sister, cousin joined the party a long time ago and family feels obligated to support the party
3. Mugabe was gifted speaker who tapped into the anti imperialist/colonialist sentiment in Africa. He is loved by many Africans because he dared publicly speak out against the West. He always loved Europe until they put sanctions on him and then he turned towards the East.
4. Mugabe ran on a tribal ticket. You will find more supporters in certain tribes than in others.
The biggest reason he is still popular today is because of his anti West rhetoric. Which is a pity but to each their own. I hope this sheds some light to an HNer who encounters Africans who think the world of Mugabe.