You do not need to denigrate Magna to understand Fisker. Magna Steyr is the manufacturer and is an auto contract builder for many companies, just look at the list:
magna-steyr
Fisker is another story:
Unusual for the CEO of a car company, Fisker isn’t a financial guy or an engineer but a designer.
www.caranddriver.com
He has had some cars he designed that became successful, more or less:
BMW Z8, Aston Martin DB9, Aston Martin V8 Vantage, Fisker Karma, Galpin-Fisker Mustang Rocket, VLF Force 1 V10, VLF Destino V8, Fisker EMotion, Fisker Ocean, and Fisker Orbit.
They have all been small volume and all, in my opinion, valued form over substance.
He did have a role in design of the Tesla Model S but:
Musk sued Henrik Fisker, unsuccessfully, for breach of contract early in Tesla’s formative period.
www.forbes.com
Simply stated, Fiskers own history shows why his new efforts will not end out successful, just as most of his others have had modest success at best. The BMW Z8 and the Aston Martin's have been the successes.
So, Fisker himself explains it all. Frankly the real question is how he's conned Magna Steyr to build Fiskers. They can build any cars at all, as they've proven, but they do insist on being paid and Fisker is not noted for designing profitable vehicles. Allegedly none of his designs have been profitable. The BMW Z8 was an M5 mechanically, and had under 6,000 ever made. Nevertheless, it was Fisker's sales triumph.
That track record is rather unenviable, but somehow he still can raise enough money to try. Just don't expect anything other than good build quality, if they actually happen at all.