It’s interesting to note that the only conciliar condemnation of the soul’s pre-existence (and, thus, reincarnation/rebirth), is in the (the so-called “
monstrous restoration”), the idea that since we all come from God (our souls existed with God before being born in physical bodies), we will all
definitively and without question return to God. Thus, one could argue that the primary reason pre-existence (and by implication reincarnatin/rebirth) was rejected by the Church, was because it was too closely associated with an idea that did not encourage real moral and ethical discipline and devotion: if we’re all headed back to God, why be good or do good? It’s conceivable that if pre-existence and reincarnation/rebirth were not easily misinterpreted as justifying a lax spiritual life, then the condemnation would not have occurred. But what’s done is done
There’s a Hindu renaissance occurring as we speak, and a large part of the renaissance is the purification of the corrupted (mis)understandings of reincarnation/rebirth that have dogged Hindu history for too long, particularly in the form of a rigid, birth-based caste system. There’s a positive side to any sort of birth-based social system: such systems are able to survive for millennia, because the birth-based practices help keep alive traditions that otherwise would have disappeared. Thus, we have modern-day brahmin families who have been memorizing and reciting Hindu scriptures for at least 3000 to 4000 years, if not more. (And Judaism likewise, may be seen as following a largely birth-based social system as well, thus accounting for its long survival.)
The Hindu renaissance is a result both of internal and external challenges. Internal, because Hindus throughout the centuries have been critical of the corrupted misunderstandings of doctrines in their own religions, and have sought to change them, with success in some areas and less success in others. External, because the Islamic and Christian invasions of the past 800 years have presented non-Hindu critiques of those (mis)understandings. What this indicates, I believe, is that since each religion emphasizes certain ideas, all religions have some positive criticism to offer all other religions. Islam can help Christianity not de-emphasize God’s unity, while Christianity can help Islam not de-emphasize God’s immanence. Likewise, Islam and Christianity (as well as Buddhism and Sikhism) can help Hinduism purify its understanding of family and caste; and Hinduism (and Buddhism) can help Christianity see the ways in which reincarnation/rebirth might actually help some
people be better Christians.
Of course, many Christians do believe in reincarnation/rebirth. Twenty-five percent of
Catholics do, and there is a
whole denomination that expressly teaches it. But it’s also interesting to note that many Hindus
don’t emphasize or believe in reincarnation/rebirth. There are many reasons for this. Some Hindus de-emphasize or reject reincarnation/rebirth because they (e.g.,
the Vira Saivas) see it as too closely associated with the oppression of the untouchables. Other Hindus are more philosophical about it, arguing that from the perspective of “
only God exists”, there is
no separate “creation”, no separate “soul” that truly, ultimately, exists apart from God, so how can such a soul “reincarnate”? Still other Hindus take a more pragmatic approach: “If I devote myself exclusively to God, and if it’s God’s will that I reincarnate or don’t reincarnate, then that is totally God’s prerogative. My only desire is to follow His Will.”
But, I bring all of this up to show that within Hinduism (and Buddhism) reincarnation/rebirth is not conceptualized as something that has always existed, or will always exist, or as something that is the ultimate Truth. Reincarnation/rebirth is provisionally true, non-ultimately true, perhaps true from one perspective, but not true from another perspective. The only Real Truth is God, the Deathless, the One Divine Radiant Person, the Source of all birth and death.
Its interesting that the article you quote on 25% of Catholics believing in re-incarnation is actually explaining that those 25% have been mislead and don’t understand the teachings of the church. Any you make it sound like there is a Catholic group that expressly teaches reincarnation - Unity is not in the least bit a Catholic group.
There are certain truths that are shared by all religions with Catholicism but reincarnation is not one of them. Reincarnation does not help people be better Christians. It distracts them from the Truth that they have one life to pursue love of God and neighbor and after that life they will be judged on their love. In the worst case, someone who is expecting another chance in the next life, might be condemned for not taking appropriate steps in this , their only life.