I will confess that I did not read the article on morality, since it is hidden behind a nag screen. I assume most other people did not and would not, and the commenter merely provided it for those more curious.

Generally speaking, I believe it is reasonable to only be arguing against the commenter, not the articles or papers they reference.

The commenter in question only mentions SUVs, and not trucks. So even if the article about morality did lump trucks and SUVs in the same category, that's not what the commenter is bringing to the table.

The article talks about "personal vehicles" repeatedly, starting in the first sentence, and makes it clear that it's talking about vehicles used for personal transportation.