In what year did the Catholic Church begin to tolerate Santer?a so that it could be p

Before this point, Santer?a had to be practiced in secret and the religion was in no way recognized by the Catholic Church.

Simple apostasy.

Don't know. Hang on a sec while I throw some rocks and divine the answer.

when Torquemada died. heehaw...

Never

while Santeria is recognized it does NOT mean it's accepted. many things are recognized, that does not mean it's supported.

The priesthoods of Santeria or its sister religions are not Christian priesthoods, so the Catholic Church does not recognize them. We also do not believe in spells or divination; Holy Mother Church strongly forbids all such practices, as the following quote from the Catechism of the Catholic Church shows:

All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to "unveil" the future. Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone.
All practices of magic or sorcery, by which one attempts to tame occult powers, so as to place them at ones service and have a supernatural power over others - even if this were for the sake of restoring their health - are gravely contrary to the virtue of religion. These practices are even more to be condemned when accompanied by the intention of harming someone, or when they have recourse to the intervention of demons. Wearing charms is also reprehensible. Spiritism often implies divination or magical practices; the Church for her part warns the faithful against it. Recourse to so-called traditional cures does not justify either the invocation of evil powers or the exploitation of anther's credulity. (CCC 2116-2117)

Moreover, our Faith has no "initiations" like those of Santeria. We do not believe that the saints can "possess" people; the Church in fact condemns spirit-possession and combats it with exorcism.
Finally, the Catholic Church does officially condemn Santeria and its sister-religions. This fact does not always filter through to the people who practice these religions; many of whom also attend Catholic Masses and consider themselves Catholic. Many priests in countries where these religions exist are unfortunately lax in making the Church's view on this issue known. Even when a priest speaks against these religions from the pulpit, his sermon is often dismissed as "the kind of thing priests say". Like the originators of Santeria centuries ago, their descendants are still reluctant to part with their religion and their beloved Krisha's.

Santeria is satanic....I didn't know it was being embraced by the catholics.

Santeria is not condoned or supported by the Catholic Church. It is still practiced in people's homes and other areas NOT inside a Catholic church.

Santeria may 'borrow' some things from a Catholic Church mass, but it is in by no means, a 'Catholic' practise.

No later than 1965.

The Vatican II document, DECLARATION ON RELIGIOUS FREEDOM, DIGNITATIS HUMANAE (Human Dignity) was published on December 7, 1965 and states:

The human person has a right to religious freedom. This freedom means that all men are to be immune from coercion on the part of individuals or of social groups and of any human power, in such wise that no one is to be forced to act in a manner contrary to his own beliefs, whether privately or publicly, whether alone or in association with others, within due limits.

With love in Christ.