Rallies took place in Arnhem, the city where the incident took place, as well as Eindhoven and The Hague.
About 2,500 protesters showed up in Arnhem - many waving rainbow flags.
One of the men, Jasper Vernes-Sewratan, thanked the protesters and said "You have pulled us through this terrible week", AFP news agency reports.
His partner Ronnie Sewratan-Vernes, who lost teeth in the attack when he was assaulted with a bolt cutter, was in tears during the rally, AFP added.