I don’t get it either. The US has confirmed that IS was responsible.
People believe US Intelligence warned Russia of a terrorist attack, then disagree with US Intelligence after said attack happens? It makes no sense.
Hate Putin for the atrocities he’s certainly responsible for. Spreading false information obfuscates what he’s actually done.
I think intentionally not preventing the attack is definitely plausible. I guess I should have been more clear–my comment was more aimed at accusations that Putin orchestrated the attack.