Tubpojntxoog,
You are incorrect when you say that people from the same clan don't know each other. Perhaps the younger generation have no idea who their extended families are but ask any important elder in a clan and he'll know which subgroup belongs where. Without disclosing my clan, I once met a woman with the same clan name who asked which subgroup I belonged to. Right away she knew of my subgroup's leader even though I had only met her for the very first time. The problem is that nowadays the younger generation doesn't know their own history so they become strangers in their own clan. I suggest you learn more about your clan and the pertinent leaders of your clan's past. You will see that they are all connected.
Honestly, the only people opposed to our clan system (which makes us unique from other groups) are one or two things:
1. outsiders of their own clan
2. come from a bad clan
I'll add that those people are ignorant and self-serving.