You are right, attitude towards newbies are negative here. But there are many reasons why. Newbies asking same general questions which was already asked million times. These users should put only minimal effort to find the answer, it's not that hard. For that purpose we have sticked topics with general information that they need to know. If they didn't found answer, it's nothing wrong to ask here. And more experienced members are getting tired to see and answer same questions. You are saying that some people are lazy by nature, but it's their own problem. 
But I'm seeing harsh attitude towards newbies not only here on Bitcointalk, but pretty much everywhere where we can find discussions about crypto. Newbies asking same questions like "How to buy BTC with USD", "Which exchange, wallet to use", "how long verification takes" and etc.