Forgive me for making this observation, but aren't playing up class warfare, five year plans, collectivisation, the planned economy, wholesale nationalisation, the suppression of all religious belief and stamping upon free enterprise all rather left wing?
Those were the idea of the left (and far-left for some of them) a few decades ago. I doubt than any modern left-wing party hold them.
Class warfare is pretty much dead since most people are middle class. They are not poor nor wealthy, they are in the middle, so, not interested in a war between poors and richs. And the left-wing party have a more significant young wealthy electorate, so, that wouldn't be good. I come from an higher-than-average middle class family, so, no, I wouldn't approve class warfare. The side fighting a war is the right. They want to empower even more the big corporations, because of the laws of the market. This is a bad idea, because the market isn't competitive on many things, which are monopolies, oligarchies and cartels. In those cases, the laws of market don't apply and more the monopoly is efficient, more the products are low-quality and expensive.
And the private sector isn't really more efficient. At my job, we have to deal with some businesses with bureaucracy heavier than the government, so, please not continue to state that fable.
Five-year plans and the planned economy. I don't think I ever heard someone proposing them in the Western World since decades. I don't think than the government needs to manage the industry production. Through, it needs to check if the country produces enough of the vital ressources needed (enough food, enough energy) in order to be self-sufficent if a problem arises.
I'm not a fan of forced collectivisation of work, and nobody proposes it (except some areas in Israel) but, it's a from of cooperative and if people want to take part in it, I don't see why to oppose it if everyone agrees.
Nationalisation. Well, some things should be nationalised, other should be privatised. The important services to the population should be nationalised, as should natural ressources do. The natural ressources belongs to the country, so, to the people, so, the profits should go to them, not to private entities, especially if they aren't renewable. However, things like phone should be private (but with controls, we wouldn't want our communications system owned by an enemy country in case of a war!).
Imposition of a religion or the imposition of the absence of a religion is a mark of dictatorship, not so much of an ideology. Those countries banned religion as the Church was a (potential) opposition force they feared. It's destroying opposition, not ideology.
Free entreprise. The program of my left-wing party contained tax cuts for small businesses while cancelling the future tax cut for the big ones. In most of the western world, through the various loopoles, tax rebates, credits, etc..., the big businesses are paying less taxes than small ones in %age. The left just want to even the field between the big and the small businesses, which causes more competition, which drive quality higher and/or prices lower, which is a good thing.
But I understand than the big businesses are funding the political parties more, so, it's them who get the tax cuts, not people nor small businesses...