I believe that it could be that they never believed in to begin with.

But ran with it since they understood their base.

But Bernie is a weird one since he spent his honeymoon in the USSR, which is pretty hardcore dedication if he was faking it.

Now he is all for destroying the successor state to the USSR.

My theory is either Bernie wants to save Ukraine because he is a kike.

Or that Bernie has bought into the liberal talking points that Russia is too white of a nation that rejects globohomo nigger and faggot worship, therefore it must be destroyed for "San Francsico" values to spread.