You certainly are. Most people see further than the end of their nose.
Most people actually back their points up rather than just giving it the "clueless", "open your eyes" type stuff and then going AWOL when you get asked to explain what you can see that others can't.
"you know nothing"
"explain to me then"
"this is damaging your credibility you not knowing anything"
"can you explain to me what i dont know"
"open your eyes, everybody can see it"
"explain to me how it works"
Then:
It is so easy to tell people they don't know anything, can't see things etc etc when you don't bother to explain what it is they don't know.
Still, I guess if you keep saying others dont know anything over and over again then people might not notice you not able to actually explain what they don't know and start to believe you