But seeing as it is a question about BYU fans, and has my opinion changed?

The only thing my opinion has changed about is the toxicity on CB.

BYU fans are generous. . . Already knew that
BYU fans are very enthusiastic and love their team . . . Already knew that
BYU fans travel well . . . Already knew that
etc

The only CHANGE of opinion is CB would still have plenty of toxicity intermixed with the good, even when we are outperforming expectations and in the middle of a great start. In 2021, I just didn't see the same toxicity after we started 5-0.