Bolton is a very heavy-hitter and has often been decribed as a neoconservative.
The article is critical of Obama‘s deal with Iran and more importantly it cites Trump’s team’s turning a blind eye to the evidence coming from Iran.
Iran’s geopolitical influence has increased because of Obama’s disasterous Middle East policy. Now Iran looks to gain leverage in both Iraq and Syria because of Trump’s weakness. Already right wing sources in Israel are arguing in favour of Israeli unilateral action against Iranian interests.