Integrity takes a hit with people who like to sling mud and whom are not forgiving. I think he has changed. I think he is changing as we speak. I see it in him throughput his campaign.
I agree that as children of God we should not be hypocritical by not forgiving people of their transgressions when Christ has forgiven all of humanity (if they accept Him as their Saviour).
However, a repented child molester who served his time in prison can be forgiven but not allowed to babysit children. This doesn't mean society is "unforgiving" of the person. It just means we have to be prudent by not putting someone who can't be trusted in such a position he could relapse and stumble/cause harm to children.
I'm not comparing Trump's braggadocious infidelity to child molesting, but rather I'm comparing that society can forgive both types of sinners but exercise caution especially when considering the most powerful position in the world, the president of the United States. As I said before, if a candidate can't be trusted to be faithful to his/her own spouse, how could we objectively trust them to be faithful to the American people?