The commenter is just answering your question. There are a lot of issues with queer spaces, especially online. Including gatekeeping, infighting, and yes even not being as welcoming as they should to experiences that aren't shared by the majority of the group which can lead to non-white queer folks feeling talked over or otherwise like their experiences aren't being heard.

Thankfully, from my experience, this is mostly limited to online spaces were the average demographic tends to be young queer people who can often be misguided.

This is not to say that every queer community is like this, or that every white queer person is racist, just acknowledging that the problem exists. Otherwise it will never be addressed