I wanted to say this a while ago already but somehow never got around to it before...
I like they way you are making nomads a bit less one-dimensional than the usual ***humans die blarg***.
I got no problem in accepting your kind or RP... whether you see it yourself as a nomad trick to sucker some treehuggers into their influence, or whether they are genuinly friendly.
I would have a problem with it if you tried to convince people that everyone who RPed a nomad has to do it your way, or if you didnt accept that other human characters dont "believe" your nomad. But I dont see you doing that, its rather the people who are criticising you who are doing that.