The meaning of the word "INTEGRITY" is clear.
If the meaning of the word "integrity" becomes "holding true to your beliefs", then "integrity" becomes subjective and has no relation to the external truth anymore. At that point, the very word "integrity" looses it's integrity.
Yes, according to "their truth" Biden won the election. But what if there is evidence that they are wrong? Does their belief make them correct?
Trying to overturn an election where you believe that the results were correct lacks all integrity.
If there was no evidence of fraud, then intellectual honesty on both sides would cause them both to accept the outcome, like in 2008 and in 2012. As it stands, claiming and celebrating a victory, while 47 electoral votes are still undetermined, lacks integrity and it is nothing more than play-acting with no substance behind it.
If the tables were turned, do you think the left would be OK with Trump shooting off fireworks in a contested election?