Opponents of gay marriage in France have threatened violence after lawmakers expedited final passage of a marriage bill.

The French Senate on Friday approved the bill which seeks to legalize marriage and adoption for gay couples, joining the National Assembly, which approved the measure in February.

Minor alterations in the Senate means the bill must return to the lower house for reconciliation. Lawmakers were scheduled to consider the changes on May 20 but announced on Friday that the National Assembly will get the bill next week.

Opponents, who had planned to stage a massive protest rally on May 26, cried foul.

“This is a disgrace,” said Frigide Barjot, the actress-activist who has led the opposition. “The French people don't want this law, and what do they do? They speed up its passage. [President Francois] Hollande wants blood, and he will get it.”

Members of the conservative UMP Party joined the fray. Deputy Chris Jacob said in a statement that Hollande risks “a violent confrontation with the French people,” while deputy Herve Mariton described the move as “an incitement to civil war.”

(Related: Wilfred de Bruijn: Marriage debate has increased anti-gay sentiment in France.)