I don't even know how this is a right vs. left political issue. She asked him to stop using her son's name. Just respectfully stop using his name. You can still bring up Benghazi if you want to. Sure, the left can twist this into an anti-Trump issue, but it will be forgotten in a week if Trump drops it.
It’s a political issue because most on the right have contrived the lie that ‘Benghazi’ was the ‘fault’ of Obama and Clinton, and that some ‘cover up’ is involved.
Needless to say nothing could be further from the truth.
Indeed, conservatives have attempted to use the Benghazi lie as a political weapon against Obama and Clinton, where Trump has likewise attempted to propagate that lie, and attack Clinton accordingly.
From your linked article:
‘Republicans have repeatedly criticized presumptive Democratic nominee Hillary Clinton for the way she handled the Benghazi attack as then-Secretary of State.
Commanday’s request echoes the sentiments of Stevens’ sister, Anne Stevens, who said she doesn’t blame Clinton for her brother’s death and doesn’t “see any usefulness in continuing to criticize her.”’
Of course, conservatives see political usefulness by continuing to criticize Clinton, and continuing to propagate their lies, against the wishes of Stevens’ family.