They say that a week is a long time in politics.
Last Friday week, when it was more or less confirmed that a bomb had brought the Russian passanger jet from Sharm down, some British politicians and their usual suspects in the media almost showed some glee over the event with an attitude that said, with some justification, that Russia was now being drawn into the Syrian quagmire. In the middle of the week, President Obama stated that ISIS was now "contained". On Thursday, the same British elements above went into paroxyms of delight when an individual terrorist known as "Jihadi John" was killed by a drone and the media was full of "think tankers" and security specialists, most of whom said that this was a deadly blow to ISIS.
Then came Friday evening. There will be more Friday evenings.