America is unhappy with them every single day, through their foolish actions.
They are desperate.
They could do something like this to stir trouble in Russia
I think that's very, very unlikely... That would turn not only the US society against Ukraine, but also other countries. And to what benefit? There were terrorist attacks in RuSSia before and what did they accomplish? Nothing... It makes no sense (unless for jihadists, I guess, but they're not right in the head...).
Btw, if Putin will claim Ukraine is responsible for this attack I don't think anyone sane will believe it... So I'm guessing that such propaganda ploy is going to be directed mainly at the RuSSian society. I wonder how many people would buy it there...
Terrorized people are scared and weak. Remember the Boston bombing? The city stopped moving for three days
We're talking about RuSSia here though lol Firstly, RuSSians are more scared of their own authorities and, secondly, terror attacks aren't anything new for RuSSia, especially for Moscow.