"Expulsion and loss of all personal property and assets with forced travel over long distances would essentially be a death sentence in the 1400's."
1. They were not ordered to forfeit all property and assets.
2. It is a hysterical exaggeration to call expulsion a "death sentence."
That sort of disordered thinking is exactly what makes Western Civilization unable to defend itself against today's muslim threat.
"The monarchy may have been the instigators, but whoever orders such action"
The monarchy ordered it.
Those who chose not to convert were stripped of all their property and assets prior to expulsion. They were not allowed to take any more than they could carry with them.