Crimea Crisis

Crimea crisis got my attention recently as BBCNews Page on Facebook keep reporting this news and it appeared on my timeline. I do not really understand the whole story of it as I do not follow all the updates made by the page.

All I know is that Crimean Parliament declare the split from Ukraine and asks to join Russian Federation. The president of Crimea, President Putin, claimed that Crimea is now a part of Russia. However, Russia does not admit the referendum given by Crimea and therefore reject Crimea to join in.

I wonder why Crimea needs the independence and then suddenly ask for join to Russian Federation. Crimea should have asked for Russia's opinion and suggestion before taking any move. They take action without consideration and eventually get rejected by Russia, which Russia did the appropriate decision on the rejection.