well, they aren't as bad as media want to picture them. Surely they have some radical policies like kicking out all illegal inmigrants or removing laws which benefict women when they are scared cuz the husband etc etc (not saying I do support it, just saying some of their worst policies in my opinion) .
But this movement is getting famous bc:
1. some Spaniards are tired of seeing our county breaking apart due to catalonia's independence movement
2. The rise of a 'extreme leftiest' (Unidas Podemos) in the past elections
3. The rise of nationalism. After Franco (last Spains dictator), if you said you love Spain, your country, people would assume you were a fascist or something like that bc they would like the love to your country to Franco. But now with Vox, it is way more accepted to say 'I love Spain' (not in all parts of spain, of course)
Vox movement is just the counter-movement of all the hate our country got from some Spaniards
They are a far-right political party. Racist, homophobic, sexist. Their speech is very demagogic and populist. You can imagine the rest.