Having done a bit of looking around, I guess it's a reference to this - less "shooting down the plane was good", more "what if it was a FALSE FLAG, eh?":
The death of almost 300 innocent men, women and children on a Malaysian airline flight has shocked the world. Flight MH17 from Amsterdam to Kuala Lumpur was travelling over the conflict-hit region when it disappeared from radar. A total of 283 passengers, including some 80 children, and 15 crew...
www.marxist.com
I'd never looked into their position on Syria before now, but it turns out they have some spicy takes on the White Helmets and related matters as well:
Alan Woods takes an in-depth look at the situation in Syria, where the ceasefire has broken down. The dire situation reveals the cynicism of the imperialists - and the horror without end that they have created.
www.socialist.net
Anyway, I suppose this raises some big questions: Will they come up with a new theory explaining that the Labour Party was the only correct place for socialists to be from its founding up until July 2021, but it's now bankrupt and must be smashed so a new workers party can be built, or will they continue to insist, Groucho Marx-style, that everyone should still be in Labour? Or split between the two options?
Also, does this mean that AWLers can be in Labour but SAers can't, and if so does that mean the AWL can now bully them ("oh, just off on my way to the CLP meeting, it's going to be so much fun, are you coming... oh wait, I forgot, you can't, can you?") or does it mean that they can now bully the AWL ("goody-two-shoes Schachtmanites, can't even get expelled!")?