I don't feel that i belong to any group (even when people do like me).
Sociologists say that belonging to groups (i.e.: family, activity, work, country, personality, etc.) is one of the core motive of all social relationships.
Also, the more group members have points in common (activity, rituals, objectives, age, etc.), the more they identify with the groups.
Rejecting a different minority from the group comforts the belonging feeling and bonds of the majority of the group. As a result, if you show yourself/ or look like different, there is a high risk of being rejected. When you are autistic, you start with a difference (more / or less conscious). So it is difficult to pass unnoticed, in a group and not be bullied.
In groups composed of more different members (i.e.: activities, rituals, objectives, age, etc.), there is less rejection.
Indeed, i noticed that it is always much easier for me to be accepted in the heteroclite groups.