It's always the platform and never the people using the platform.

Go into a left wing chat, you might get radicalized to the left.

Go into a right wing chat, and you might get radicalized to the right.

Discord, afaik, does not even have any kind of algorithmic sorting/recommendation system to even allude to possible skewing by the developer toward a certain point of view. It's just the other people you are hanging out with and exposed to.