Elections a threat to Democracy?

Democrats extol the virtues of democracy constantly, but somehow, democratically elected leaders who refuse to follow their leftist agenda, are labeled threats to democracy. Robert Fico, Prime Minister of Slovakia who just survived an assassination attempt, is one such person. He depicted at a far-right extremists, sometimes even a fascist. Somehow, a populist leader who was democratically elected to his position several time by the people, is considered a threat to democracy. These same people have no problem with non-citizens voting.
Sources:
⁠Robert Fico: World reacts to the shooting of Slovakia's prime minister | Reuters⁠⁠Democrats deny non-citizens are voting in federal elections while Republicans seek to prevent it | Just The News