BUDAPEST, Hungary — Hungary’s parliament on Monday passed an amendment to the constitution that allows the government to ban public events by LGBTQ communities, a decision that legal scholars and critics call another step toward authoritarianism by the populist government.

The amendment, which required a two-thirds vote, passed along party lines with 140 votes for and 21 against. It was proposed by the ruling Fidesz-KDNP coalition led by populist Prime Minister Viktor Orbán.

Ahead of the…