Yeah, perhaps they abandoned that policy so they wouldn't be not inviting the first black major party presidential nominee, and are not resurrecting it now because that policy is gone for good or that they similarly didn't want to not invite the first female major party nominee.
The Pope is a very strong Hillary supporter (or more correctly, the world's strongest anti-Trumper by far), so it would have been very odd indeed if only Trump had gotten the invitation. The Pope is everything that Trump is not, and the other way around. The Pope is pure goodness, while Trump is pure evil.
