Your reasoning is impeccable, bravo. But it's wrong. Both your premise and your conclusion are based on completely wrong assumptions.

Not sure which premise you disagree with, but the conclusion follows from them.

I am a Service Provider ("Diensteanbieter") according to DDG and I don't block a single page, which makes your statement not only wrong, but rather so wrong that not even the complete opposite would make any sense.

Not necessarily. Perhaps small service providers are exempt from blocking sci-hub.se. But Cloudflare is certainly not small.

Have you ever considered reading the law before attempting to discuss it?

You are clearly unable to cite a portion of the law which proves that Cloudflare counts as a service provider.

§ 1 Absatz 4 Nummer 5 Digitale-Dienste Gesetz: Im Sinne dieses Gesetzes ist oder sind „Diensteanbieter“ Anbieter digitaler Dienste;

That's just stating a tautology.

No, it's not. It's a very precise way to state that the law has to be applied to a very wide range of service providers. This is a fundamental change compared to the previous regulation TKG. Now take the loss and next time, read the damn manual first.

The quote does not decide whether Cloudflare counts as a "service provider" or not.

Oh really… then let’s make it obvious:

1. Do they offer any kind of service? YES.

2. Is the service they offer of a digital nature? Also YES.

It’s never been easier.