All the Russian parliament said (according to the OP link) is that they would recognize and accept the Crimea as part of Russia IF the latter votes to join the former in it's referendum.
And this nonsense about 'the Crimea leaving the Ukraine without Kiev's say so is against the constitution' is ridiculous.
If a state/province/territory votes to leave a country, they should be able to leave...period. So under this stupid constitution, if 100% of Crimeans voted to leave the Ukraine, they would not be allowed unless Kiev says 'okay'? That is exceedingly repressive.
I have ZERO problem with the Crimea leaving to join Russia so long as the referendum is fair.
This story has been SO hyped...it once again shows just how stupid/ignorant most 'journalists' really are...or how desperate for copy their editors are.