As an anecdote for those among us who aren't so inclined to compromise fact for being kind, here's a bit from everyone's favourite Mahayanika, Nagarjuna, on why the Buddha's compassion and kindness trumps all his other qualities, including his wisdom, that I feel is quite salient to the topic:
In the Mahaprajnaparamita Upadesha, Nagarjuna wrote:
Question. - All that resides in the mind of the Buddha is great; why do you say that only his loving kindness and compassion are great?
Answer. – All the qualities belonging to the Buddha are necessarily great.
Question. – If that is so, why do you say only that his loving-kindness and compassion are great?
Answer. – The loving-kindness and compassion are the root of the enlightenment of the Buddhas. Why is that?
The bodhisattva sees beings tormented by all the sufferings: suffering of birth, old age, sickness and death, bodily suffering, and mental suffering,suffering in this life and in the next life. Feeling great loving-kindness and great compassion, he comes to save beings from these sufferings, and subsequently he forms the resolution of seeking anuttarā samyaksaṃbodhi.
By the power of his great loving-kindness and great compassion, in the course of saṃsāra in innumerable incalculable lifetimes, his courage never sinks. By the power of his great loving-kindness and his great compassion and although he could have attained nirvāṇa long ago, he does not give the evidence of it.
This is why, among all the attributes of the Buddha, loving-kindness and compassion are great. If he did not have this great loving-kindness and this great compassion, he would enter nirvāṇa too soon.
Next, when he attains enlightenment, he realizes innumerable very profound concentrations, trances, absorptions and liberations. Experiencing this pure happiness, he abandons it and does not keep it. He goes into the villages and the towns and preaches the Dharma with all kinds of avadānas and nidānas.
He changes his form and guides beings by an infinity of vocal sounds; he endures curses, injuries, criticisms and slander on the part of beings and goes so far as to become a female musician: all that thanks to his great lovingkindness and great compassion.
Question. – There are yet other qualities in the Buddha, such as concentration etc., and people do not know them, do not describe them as great. But the Buddha’s wisdom (prajñā), his preaching of the Dharma, etc., make beings find the Path; why are they not called great?
Answer. – Nobody fully knows the power of the Buddha’s wisdom but, in his great loving-kindness and great compassion, the Buddha, from lifetime to lifetime, sacrifices his life and abandons the bliss of the concentrations in order to save beings and this everyone knows. The Buddha’s wisdom is cognizable by induction, it cannot be cognized directly. But his loving-kindness and compassion are visible to the eye and audible to the ear; they are cognizable, for the Buddha has uttered his lion’s roar several times.
Furthermore, the Buddha’s wisdom is subtle and wonderful and if the bodhisattvas and Śāriputra do not know it, what can be said of other people? Lovingkindness and compassion are visible and audible and people can believe them and accept them. The wisdom of the Buddha is so subtle that it cannot be probed.
Furthermore, great loving-kindness and great compassion are loved by everyone: they are like a delicious medicine that people like to swallow. Wisdom is like an unpleasant medicine that many do not like at all. But because they like loving-kindness and compassion so much, they have described them as great.
Furthermore, there are hardly any beings already enlightened who are able to believe and accept the Buddha’s wisdom. In contrast, great loving-kindness and great compassion are of such a different kind that everybody can believe them and accept them. As they have seen a picture of them or heard the voice, they can believe and accept them and, since they have derived much benefit from them, they call them great loving-kindness and great compassion.
Furthermore, great wisdom has as its nature the relinquishment, the rejection of dharmas; great loving-kindness and great compassion have as their nature pity for and service to beings. This pity and service are loved by all beings; that is why they call them great loving-kindness and great compassion of the Buddha.