It may be that Russian influence is causing problems in Crimea, but you should also know that that portion of the country is hugely ethnic Russian, and strongly in favor of Russian rule.
This is kind-of-almost true, but the majority of the Crimean residents do not support it (yet). At least according to the following study.
In Ukraine, as well as in Russia majority of respondents wants both countries to be independent, but friendly - with open borders, without visas and customs houses (in Ukraine – 68%, in Russia – 59%). In Ukraine with numbers have decreased since November, 2013 by 5%, in Russia – increased by 4%. Integration with Russia into a single state is supported by 12% of respondents in Ukraine, and during recent years this number has decreased from 20% to 9%, but after Maidan – increased by 3%. The main part of supporters of this idea of unification with Russia is in the East (26%) and South (19%), while the smallest part is in the Center (5%) and West (1%) of Ukraine. By regions majority of integration with Russia in one state is in Crimea (41%), Donetsk district (33%), Lugansk district (24%), Odessa district (24%), Zaporizhzhya (17%) and Kharkiv (15%) districts, but even there support to the current status of relations with Russia - as two independent and friendly states – prevails.
Among Russians the desire to have Ukraine and Russia as two independent and friendly states (with open borders, without visas and customs houses) prevails as well as among Ukrainians (68% and 63% respectively). Integration into one state is supported by 9% of Ukrainians and 32% of Russians. There is direct dependence between desire to unite with Russia into a single state and age of respondents: among youth up to 30 years old 5% want this unification to be realized, among people of 30-54 years old – 11% support that, and among people older than 55 years – 17%.
It is obvious, that among supporters of joining the Custom Union, there is more people supporting unification with Russia (26,5%), than among those, oriented on joining the EU (1%). However, even among supporters of entering the Custom Union majority wants to preserve the status-quo in relations with Russia (69%). Among people, having negative attitude towards Maidan, only 21% wants to unite with Russia into a single state. Among supporters of political parties the highest percentage of people, who wants join Ukraine to join Russia, is among communists’ electorate (35,5%), but even in this case majority consider that Ukraine and Russia should be friendly independent states (63%). Among Party of Regions voters 28% support unification with Russia.
In Russia 16% of population support unification with Ukraine into one state.