lrn2read guys, he said there was NO Angel tag. By the fact that you said he killed him in 2 shots I'm going to assume it WAS an admin.
Let me sort this out for you, its one very basic rule, not a lot of confusing rules. You're over complicating things.
If your group has a tag (lets say [Tag]Ship.Name)
Those ships need to use the same ID. - NOW THAT SETTELS THAT PART
We still do not know the circumstances as to why you friend was shot. Until we have details we cannot help any further.
You ARE allowed to have Zoner caps with IDs that allow caps.
You ARE allowed to fly into house space as per game rules (it may be against the law ingame but thats up to you).
So long as you abide by the Official Rules you are more than welcome here. Next time an incident happens, try to understand the "why" and "how." Just like any game, this one has rules, when you break one, try to find out more specifics so that you may continue playing and have fun.
New players are more than welcome, but you must come with an open mind in a game that is so very large and in depth. Leaving is not the answer, being willing to learn is.
Asking questions like this thread is good, but using "leaving" as an alternative or threat doesn't help people want to help you. It's like telling a doctor he sucks then asking him to fix your wound.
It seems to me you guys are find at the moment the way you play, perhaps there are a few things you'll need to change, but players and admins will help you if you're willing to listen and change.
Like every game, this one has rules, we need to be willing to learn them. Obey the Official Rules at the least, whether you choose to abide by the in-game laws is your choice.