Yes, Kellogg's was right to pull advertising from Brietbart's site. They say that the ideas put forth on his site do not align with the company's values. This is a reasonable stance and one more companies should take when selecting places to advertise. However, it's disappointing that it took so long for them to come to this decision. Brietbart's views haven't changed recently, suggesting that either Kellogg's was not paying attention before or they have other ulterior motives now.
Yes, Kellogg's is right to pull advertising from Brietbart's website. Brietbart is a very controversial website containing articles that can be considered anti-Semitic, misogynistic, racist and xenophobic. If Kellogg's does not want to be associated with this type of inflammatory rhetoric, is is fully within their rights to pull advertisements from this website.
Strange that Breitbart didn't care about child labour while Kelloggs were advertising with them. If Kelloggs are so dreadful then why did Breitbart allow them to advertise on their website?
No good feigning horror only when they take their money away, only a simpleton would fall for that. All this does is make be more likely to buy Kellogs.
When most people sign up for Google ads, they don't specifically choose what websites to be on. In this case, Kellogg's made a specific request to withdraw from Brietbart because of what Brietbart stood for. Alternatively, Kellogg's has recently been accused of using child labor from other countries in some of their practices.