What he says at the core is perfectly fine.
His mistake is politicizing the message when there is no need for that and hinting at a connection between Trump becoming president and that the people who voted for him likely don't support what is written in the e-mail.
From an outsider's perspective: The reason for that might stem from the fact that this election was fought like a war, as in, they demonized the enemy. This was especially strong when it came to Trump. So now that the election/war is over, some people can't go back to view the "other" side in a rational way. For them, that side is still exactly everything the media told them it is and I believe that is the case here.
From an outsider's perspective: The reason for that might stem from the fact that this election was fought like a war, as in, they demonized the enemy. This was especially strong when it came to Trump. So now that the election/war is over, some people can't go back to view the "other" side in a rational way. For them, that side is still exactly everything the media told them it is and I believe that is the case here.