If you've got any sources on the pro-russia protests, though, I'd appreciate them, since I've seen very little on that.
Here's an
older one and here a
newer one. The older one is more interesting since it was before there were Russian troops in Crimea.
I've seen more in articles and TV, so there were many pro-Russian protests in Crimea, though they seem to have become more prevalent with the leadership change and the arrival of Russian troops.
It is probably safe to say that a significant majority of the Russian population in Crimea supports joining Russia now. Correspondents have seen pro-Ukrainian protests too, but these were fewer and smaller by far (also no surprise with Russian troops in the country).
Generally speaking the whole crisis in Ukraine has fueled Russian national sentiment enormously, both in Russia but also everywhere where there are Russian minorities. Apparently that is true even for people who normally are not overtly patriotic, that seems to be confirmed by what the Russians in this thread are describing.
In Crimea Russians are a majority, so that was not surprising. There were also pro-Russian protests in Eastern and Southern Ukraine, which - with the tone we hear from Russian media - is a reason to worry that Putin might want to try something there too. The Ukrainian military is now trying to secure the Eastern border just in case, which is also why they won't intervene in Crimea. (Apart from the fact that they probably couldn't achieve much there.)
And of course the Baltic states, where Russians are up to 25% of the population, are worried, though they have been reassured that they don't need to worry, which I guess as NATO members they don't need to.