Under the leadership of Dominican Tomas de Torquemada, the Spanish
Inquisition decided that Jews posed too great a risk to Christians
to be tolerated. As a result, Jews in Spain were given three months
in which to convert to Christianity or to leave. Probably around
half of the Jewish population chose conversion, while many of the
others fled to North Africa.
Citation:
Editors. "Jews in Spain forced to decide between Christianity and exile".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=13894, accessed 21 May 2013.]