Fox, i can't accept your characterisation of the Ukrainian Parliaments actions as unconstitutional if that implies they are wrong and unjustified.
The puppet of putain signed an agreement on the 21st Feb to implement change then promptly fled the country.
A cynic would suggest that such action was pre-planned and designed in conjunction with excessive provocation in invading Crimea to trigger a response from the Ukrainian side that would justify putain rolling over the border and occupying the entire or at least East of the country.
In the circumstances they were faced with should the Parliament have thrown their hands up and done nothing awaiting putains puppets return?
The clear evidence of corruption as illustrated by the footage of the bizarre residence formally occupied by putains puppet was more than enough for the democratically elected Parliament to take the action they have vis a via putains puppet.