When you say "SPD of old" when are you referring to by "old?" 

Didn't the SPD used to be a genuine Orthodox Marxist party?

That seems well to the left of what mostly looks like a social liberal party today. 

If you mean culturally it is to the left of what it was historically, that might be true, but culturally the developed world has shifted to the left, as we have been shedding agricultural society decayed institutions (i.e obsession with fertility for expanded agricultural production and the controls surrounding that.) 

The economic consequences of capitalism and wage labor as the dominant relationship of production (versus subsistence farming) is what is making people in general "more left wing" culturally. It has just taken centuries for culture to shift with that reality as it further intensifies. That is also why the right wing's insistence on bringing back norms constructed in and for agricultural societies won't work in the long term. 

turns out people dont like being replaced, go figure

Except if it is by Russians apparently.

It's selective replacement fears a lot of the time. Even here in the USA, some people who freak out about immigrants and non-immigrants that aren't white wouldn't bat an eye with white immigrants from the UK, Canada, Australia, New Zealand, South Africa, Germany, Poland, Russia, and so on. 

Not saying rural areas in the USA or some other nations are a monolith but I think some of the racists that live in suburbs and urban areas should just move to sparsely populated areas if they are that afraid of diversity. Easier said than done, but they should consider it. 

Aren't most of the problems in Europe right now being caused by Russia and the USA? But oh yes, immigration, that is, the root of all evil or something. But only if you have the wrong skin ☝🏼

I mean if the right are scared of being replaced, why don't they have more kids like certain religious conservative groups do? 

Oh wait, because there is a gender-ideology gap, and much of the right are men who want women to be their chattel again or opportunists appealing to these men (the latter describes whichever token somebody is guaranteed to bring up.) 

It isn't an accident that the internationalist far-right (which is ironically more internationalist than the left currently) have been trying to make repealing women's enfranchisement a thing. 

...Where exactly? Germany was run for the longest time by a party that's to the right. France has had exactly one leftist presidential term since 1995. The UK had a long run of rightist governments, which led to a landslide win for the kind of leftist party - which turned out to actually be quite centrist. Poland had a long rightist run. Italy had a long run of centre-right rule, followed by a fairly chaotic period of various governments, most of which seem either leftist or center. Since 1996, Spain has alternated between leftist and rightist governments, but currently there's a 8-year period of leftist rule with a high but improving unemployment rate and decent GDP growth, if I'm not mistaken.

It seems we're both Finnish, and starting from 2003, we've had two leftist governments, one of which couldn't even pull off proper leftist politics due to the pandemic and war in Ukraine. In general, the trend's been right-leaning or straight up rightist.

I don't know what the situation looks like in other countries, but I think that covers a lot already, and I bet it's not too dissimilar in other countries either. To me, saying the left has run the show seems like cherry-picking at best. If it's social issues, immigration etc. you're actually referring to, it seems the issue is that even the right has been running similar enough policies regarding them, in which case you can hardly blame the left.

Which left? Germany is run by the CDU, which is right or maybe center-right. I haven't seen a really leftist government in any european country, maybe moderate, center or center-left, but most other european countries also have center-right/conservative governments.

Really, the SPD of Willy Brandt was more right? You probably mean Schröder, who moved a lot to more conservative politics on economics and social security. But I don't see the SPD has fully bounced back from that, so they are a little more left than under Schröder, but not at all as left as they were under Brandt.

Actually, the SPD started out being much more left than they are today.  People sure like to forget that they put out a hit on and assassinated Rosa Luxemburg even though she was once prominent member of the SPD party.