>>11
Not necessarily, it depends how it is used. For instance you can disprove a theory by finding a fact which runs contrary to it.
OP complained that going to /g/ and /prog/ was mainstream so I showed him an example of where doing something mainstream isn't wrong, breathing.
The example you provided is different
Antisemite: Jews are criminals and deserve death, because of A and B.
Jew: Yeah! Lets go further and kill all minorities!
In this example the jew is misinterpreting the anti-semite's argument then attacking this misinterpretation. It's a strawman logical fallacy. The anti-semite said nothing of exterminating all minorities, just the jews.