It starts with limitations on how much the state can interfere in provincial/state, group and individual lives while at the same time balancing the need for a social safety net.
Some things that are good for the individual must be restricted for the good of the whole such as alcohol consumption, gambling, drugs etc. The aim of the liberal is to find the appropriate balance based on community standards; a practice now being tacitly practiced in Canada where the insanity of a national criminal code is moderated by local practices. For instance, the Vancouver Police department has served notice that it has no intention of arresting self growers in medical marijuana, Harper's new law, nor will the BC Attorney General enter into any prosecutions.
No true libertarian I would walk with would fail to advocate for self determination in Ukraine or anywhere elese. However that support for their rights begins with first the semi-occupation of Ukraine by Russia these many years, AND the CIA's meddling.
You cannot stand FOR their "rights" by superimposing the geo-political needs of super powers as a means to liberty.