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.
Odeh pleaded guilty in April to concealing prior convictions in her application for U.S. citizenship.