Papers across the continent were united as they said the Tory front-runner would be a disaster for Britain and Europe if elected in the current leadership contest.
France’s Le Monde newspaper said Johnson was “a stranger to logic and convictions” in a career rich in “deceits, blunders and failures”.
It also accused of being a poor foreign secretary, a jingoist and promising an unrealistic “glorious global future” for the UK.
The paper added that Johnson would be “a mini-Trump across the Channel, dedicated to its (the European Union’s) sabotage”.
The Dutch newspaper de Volkskrant dismissed Johnson as someone who “believes rather more in himself than in Brexit”.
It added that for Johnson “no scandal seems to stick, be it extramarital affairs, fraudulent statements, offensive utterances or an offer to help an old college friend attack a tabloid journalist”.
In Germany, the Handelsblatt newspaper said he would be “fatal for Britain”.
Spain’s El Pais said there was only one person capable of stopping Boris Johnson, and that was Johnson himself.
And there was also harsh words for Johnson in Italy’s In Italy, Corriere della Sera paper - but with a twist - they were spoken by veteran Tory Chris Patten.
The former Tory Cabinet member said Johnson would be “Trump’s poodle: a liar who does not pay attention to the detail of reality, tells people what he wants to hear and relies on their ignorance”.
Sticking the boot in, Patten added that Johnson exemplified the “collapse of rationality, of the relationship between the facts and what we believe” in present-day politics.
“What he is offering is impossible.”