Fair enough. We can only go on faith in the accuracy of what is posted here to make a judgement. Paco, if indeed you know current MG owners of the persuasion Guido ID'd, and I am not calling your veracity into question, then they're certainly not our friends.
Guido, the intro to your post made it seem as if that 'class' of mg owner was prevalent (you didn't use that word, I know) as if somehow these people were/are 'mainstreaming' into the c3 community. I know there are a substantial number of collector only people coming into the community, but even these folks I've met didn't give me this 'impression'.
By way of your clarification of 'some', and as Paco indicates, you're correct, we do have owners in the c3 community who aren't supportive politically, almost like a form of snobbery. All of the shooting community have examples like this. As you did point out, the buy in is very high, so does this keep out riff raff? well... maybe a certain kind, but one can certainly make the argument that a poor ambassador to the community is every bit as bad.
Here's probably what I find most disturbing about your comments though - and not from any form of criticism but as an observation:
My impression from some people that I have met who own auto weapons, is the "I have mine now, sucks for everyone else."
That stinks. We've got gun snobs, ok... Some will 'only buy American made machine guns', or only 'German WW2 guns', and all other are pieces of cr@p. But we do also have enthusiasts. We have our share of loudmouths, blowhards, keyboard commandos, but what strikes me about the C3 community as a subset of the firearms community is generally the willingness to help.
Speaking only from my experience, my shoulder starts to hurt after about 5-6 thousand rounds through a long gun, not to mention my support arm gets tired too. Not wanting to lug all that ammo back home, it's a benefit to me if someone helps me dispose of all that excess lead and powder. I've seen guys at MG shoots who bring only ammo or money to get trigger time. Most I've met graciously allow it. Hopefully your future encounters with C3's will be more reflective of the community as a whole. In furtherance of this, I'd suggest finding a machine gun shoot to attend. They're fun, loud, you see some pretty neat stuff, and... you get to shoot tannerite...