To judge something in isolation would mean not taking all the evidence and facts in to account.
"in isolation based on evidence and fact"
In isolation by way of prejudice of the subject and predetermined agenda.
The point really is tribalism and a lack of open mind.
this is very true, people do 'pick sides' and just go on what the person is like rather than what they said/done
although in this case he has highlighted this case for his own benefit
Of course he has an agenda an he manipulates information.