It would be good practice if admins would link a selection of the offensive material. That would allow both sides to debate how they judge such behavior.
Right now there are celebrating comments but I haven’t seen bad behavior myself, even in heated debates. That let’s me assume that many are thin skinned or unable to refute lemmygrad’s political opinion.
If I understand lemmy correctly then banning lemmygrad will prevent its users from participating in any debate on a lemmy. world community. Does a lemmy instance exist that federated with everybody where important communities should be hosted?
That’s besides the point and rises the suspicion that this is somewhat politically motivated. You have to judge them on how they behave in lemmy.world communities.