This is a very sad thing, not because of him, i mean, the world its full of assholes, one more is no surprise, but because he is the rolemodel of many young people and its normalicing this kind of behaviour.
It also shows one of the biggest problems of this era and the new "internet idols", , wich is the lack of any and all control mechanisms. With other cases, like singers, sports stars, etc, we had our share of moroms doing/saying stupid things, and just like with tihis guy, their fans would allow and even praise anything. However, there was always some sort of mechanism to limit that behaviour. Be it their company, the organization they depend upon, whatever. But here what we see is a complete lack of control by youtube and most related mediums.
This is terrible in many ways, because it puts a huge power in the hands of someone who, just like this guy,, could turn out to be ra really bad influence for its millions of fans. A platform like youtube cant be silent with this kind of thing and expecting youtubers to "police thenselves" its just silly.