Venezuela is failing because it was a one Resource economy ... Not because it had anti-poverty campaigns and nationalized oil.
Pre-1970s, in Europe many socialist governments were explicitly christian, that was even the case in the US With MLK and Eugene Debs being the most famous examples of explicitly christian socialists, Hell Hugo Chavez, whatever you think of him, was the most vocally and emphatically Christian political head of state in the Americas at the time, the New guy not so much.
But the point is, whether or not leftist governments are or are not christian, doesn't change the fact that the communitarian and economic egalitarian principles in the scriptures and in Judaism and CHristianity are there and binding for christians today .... I mean if Nazi's and Stalinists were anti-abortion, that would say absolutely NOTHING as to whether or not CHristians should be anti-abortion, the scriptures dictate that a christian should be.
Stalinists and Nazi's also considered homosexuality and abomination, but that should have NO bearing on a Christians view on homosexuality as a sin.
The fact that in the United States most so-called leftists are also post-modern liberals who have no real moral grounding, doesn't mean that Christians should latch on to ultra Capitalism, which has been the most destructive force to communities, families, the Church, and is the nubmer one Idol of today and goes explicitly against Christian values.