Defeats in Mideast Raise ISIS Threat to the West by Yaroslav Trofimov, Wall Street Journal
When European Islamists started streaming into Syria and Iraq a few years ago, some European counterterrorism officials viewed it as a blessing in disguise. Better to have them pulverized on a Middle Eastern battlefield, they argued, than dispersed and plotting mischief at home.
Today, that battlefield has become more dangerous than ever for Islamic State, which is reeling under U.S.-backed military campaigns in both Syria and Iraq. One consequence of this progress is that trained and battle-hardened foreign fighters from Europe are more likely to head back to home ground.
That is the alarming paradox of the U.S.-led campaign against the radical group: In the months and even years ahead, an Islamic State defeated in a conventional war may pose a far greater danger to the West than when it was focused on conquering villages in the Euphrates river valley or the hill country of Aleppo…