“I wish the Holocaust really did happen,” the man wrote in one Facebook message.
Authorities found guns, components of an explosive device, and hand-drawn plans at the suspect’s home.
A Nazi symbol also was drawn on the box, which included anti-Semitic statements and noted “bomb inside.”
He shared a meme in March that called George Soros a “Judeo-plutocratic Bolshevik Zionist world conspirator.”
Soros has long been at the forefront of several right-wing conspiracy theories, becoming a political target.
He had the realistic-looking device with him for a sales demonstration with a branch of the United States military.
The joke was not funny.
All of the students are reportedly expected to make a full recovery.
Exiting a police car, the 19-year-old managed to loosen a leg shackle and make a run for it.
The laws follow economic recessions and vigorous attempts by Lisbon and Madrid to attract wealthy investors, residents and tourists.