Should those who seek Enlightenment—with its erasure of desire and the ego—find it impossible to do so, salvation and eventual Enlightenment are still possible. Not through one’s own efforts, but on the contrary through abandoning those efforts and entrusting themselves to a Power-other-thanone’s-own, the Other-Power. In terms of a Being, this means entrusting oneself to Amida Buddha, who is Infinite Wisdom and Compassion, and, concomitantly being made one with him. As an act, it means hearing, truly hearing, Amida’s Primal Vow, which assures the unconditional salvation of those who appear to be hopelessly beyond its pale. And orally, it means to utter Amida’s name, Namu-Amida-Butsu, out of a sense of boundless gratitude. Not gratitude as an act of virtue, but as the outpouring, as spontaneous as a birdsong, of a being who in human terms is utterly unsaveable, and yet in reality is saved by the virtue of the Other Power; that is, by the Boundless Compassion and Wisdom of the Amida Buddha

This is how he ends Buddhism - A Concise Introduction, with a summary of Pure Land Buddhism from his own words.

Problem: this isn't Pure Land Buddhism in the least. This is how a Christian might view Pure Land Buddhism, and is akin to saying that the proper way for a Muslim to get to Heaven is to worship Muhammad. Buddha Amitābha is certainly an important figure in Pure Land Buddhism, but only as a focus for meditation, not as a figure that will magically whisk you away to his world if you just have faith in him, as suggested by the phrase "not through one’s own efforts". It certainly takes effort... The "land" in Pure Land Buddhism is meant to help the Buddhist envision what his own mind might be like if it were free of defilements-- we were never taught that it was a literal place and that Buddha Amitābha would be there waiting for us.

This was the most grievous thing I can remember, but there are other times when he attempts to merge the two religions that I'm not going to get into. They may not be readily obvious if you are approaching his works from a theistic standpoint. But to me as a Buddhist they stick out like sore thumbs.