this is another interesting twist: might the russians have more leverage over the military than the parliament?
i'm sure there's still a soviet-era culture within it. and i'm sure they understand what's really happening.
http://rt.com/news/ukraine-navy-flaghsip-protest-389/
if the russians can orchestrate a military coup, that would eliminate the need to invade directly. it's of course not ideal, but what just happened puts those sorts of options on the table.
the negative side of it is that russia does support some brutal dictatorships in the former ssrs. belarus. kazakhstan. i don't think anybody wants to wish that fate on ukraine.
but the russians may see it as a pragmatic solution to restore order.