I suspect the OP question was referring to acting as a real Jew.
There are a halachic distinctions which are based on ????? ???? ???.
Which is more than just having a Jewish mother or a proper conversion.
In which case the response is not only wrong, but it is dangerous and can lead to Issurim.
The Mods have warned others about making assumptions about what others are thinking, and that certainly applies here as well.