I wouldn't describe Trump as anti-Christian, though I do suspect his view of Christianity is narrow and probably more or less in alignment with the so-called prosperity Gospel. That 'Gospel' strikes me as a massive rationalization that allows wealthy people to let themselves off the hook for their lack of compassion for the poor.

I'd describe Trump more as non-Christian, based on his behavior and the values he's espoused both personally and politically. I believe Trump is mainly about self-interest and only uses religiosity as a means to get what he wants. I could, of course, be completely wrong, but the available evidence doesn't suggest it.