Do a little research and you will see how many jews actually converted to christinity, In Spain its likely more jews converted to christianity and stayed christian than either became marranos or left
There are also some very famous people who come from conversos or converted themselves among them Nostradamus, Banjamin Disraeli and Madeline Albright.
The sister of Emma Lazarus converted and there are lots more that arent even famous, it is estimated that up to a 1/3 of Spanish and Portugese people have jewish blood