I'm not even opposed to the substance of what they're saying, it's just the way they've framed it as "eye for an eye" or "I told you so" is not fair at all. The amount of horror and loss they subjected everyone else to, while ignoring and waving off every warning sign. If someone lost their family because of trump they would call this guy a monster and be even more disgusted that now he cares only because he was personally affected. That's not an "I told you so haha."
I am personally lucky enough to not be in the shoes of people who were impacted, so I try to do what you and op have said. If someone is affected though, I can say they should try and move forward and pull in someone who's learned better, but that's a huge ask to do for someone who has directly contributed to ruining parts of your life.