Guilt by association

The fallacy of guilt by association or fallacy of bad companions refers to the disqualification of an idea or position because it has been held by another person or group that is considered questionable… it is a form of ad Hominem attack and at the same time a fallacy of irrelevance (Ignoratio Elenchi), it also usually corresponds to some fallacious categorical syllogism. -

In this type of fallacious argument, there are always three components:

1. The target of the attack
2. Something considered very bad, can be a group, a person, a system of ideas, etc.
3. An irrelevant characteristic shared between 1. and 2.

example:

The record label released a CD of Wagner music The Nazis used Wagner music

So the record label is Nazi