Defining "populism" as organizing to fight a minority accused of
having taken power, a study found that populists
often
motivate marginalized and exploited people to get involved in
politics.
Some populists attack political freedoms, but this is not unique to
them. In the UK, the Tories and New Labour were hardly populists, but
they have attacked political freedoms. In France, Macron has done it.
Leftist populists often do achieve something against the problem: they
reduce
economic inequality.
Right-wing populists will not oppose the real powerful minority, the
plutocrats, so they need to falsely accuse and scapegoat other
minorities. This makes them dishonest and unjust. Despite that, they
may achieve some changes for the better -- but it would have been
possible to do the same thing without the dishonesty and unjustice.