In The Antichrist, he develops this further, including the joke "[T]here was only one Christian, and he died on the cross" (AC 39). I take this to mean that Nietzsche wants to stress the difference between his interpretation of Nietzsche and what Paul and christian theology made of him. 'Christian' in the sense of 'true to the ideas of Christ' is only Christ himself, and Paul c.s. made something different out of him.
In The Antichrist, the assessment of Christ is ambivalent:
Yes, he praises Christ in contrast to christianity. He sees Christ as a buddhist like teacher, teaching inner peace. Whereas christian theology focuses on sin and redemption of sin by way of God's incarnation as Christ in human flesh. This theology is negation of wil to power (and thus life) and leads to nihilism, pessimism, decadence. If christians had followed the teaching of Christ, this might not have been the case.
However, the resignation style teaching like those of Buddha and Schopenhauer may be better than Christianity, Nietzsche still calls it nihilistic, because it is still a way of fleeing from life, rather than embracing it.