I think that NY Times is just using this accident for political marketing against Russia. Maybe they just forgot to mention other companies involved in this project like Boeing, Alenia, Snecma... When accident happened only Sukhoi is to blame.
Lets wait for official statement and then we can judge. Right now we only have rumors and personal opinions without all facts. Personally i don't think that a sabotage or technical failure was cause of the accident. But as i said we will have to wait for more info.