I don't doubt this was ISIS, but I live in London and it's a shitshow regarding fake news and attempts to shift opinion.
With the frequent Gaza protests, UK Gov have portrayed protestors as extremists because they can't control the anti-Isreal opinion. They were branding the Muslims as a problem, but there are many non-Muslims also protesting and their sentiment is reflected in the election polls. The general election will be interesting. Now, the far right is becoming more popular, they'll be the 3rd biggest party, which could be a problem in the future for the mainstream parties who are absolutely shit and fumbling everything. Regarding Israel, no matter how hard the UK tries to spin their narrative the Piers Morgan way, most whites are not falling for it anymore.
The sentiment around Russia from the public is that they're still the villains in the Ukraine conflict and the cause of cost of living rises. UK used to call the Russians out, but it's being shifted to make Russia look less bad. The media has been messing with opinion though, all the tabloid comments sections are being spammed by bot and getting found out. Now Ukraine shouldn't be aggravating Russia, they're making gas expensive, they're targeting innocents with drones, etc.
This ISIS attack has now buried all other news so recent stories about the IDF atrocities in hospital have disappeared. Also Kate Middleton's cancer and ironically, how social media and influencers should apologise for posting fake news, is masking UK and world affairs.
I saw the captured ISIS guy video, he was speaking Russian and he looked like a random bum. For someone expecting to die, he was spineless. Maybe Putin is pretending he caught someone to show their intelligence is capable. I don't doubt it was ISIS, but I feel like it's a ploy to validate Putin's next move. If Ukraine is somehow working with ISIS, they might be fishing for support since they're not getting the better of Ukraine. Pure speculation of course, but these stories (like the Hamas incident) will validate the extreme plans of Putin.