Going along with what you said about accepting people for what they believe, there many atheists who think that belief in god and religion are the only irrational beliefs. I can guarantee you that every single person on this planet operates on irrational beliefs on some basis. I know I do myself. The real problem is that many have this notion of 'the truth', that they are right and others are wrong. We are all wrong, and you should never think that your knowledge is absolute. Always be ready to consider a new or conflicting perspective.
EDIT: I got caught up with the middle of your post that I skipped over the last line! I have no idea why you think the world needs to be rid of these people. All they do is say words, which only causes emotional damage if their victims allow it. There are plenty of other people that the world should be rid of first such as murderers, rapists, kidnappers, etc. Even thieves, which are sometimes considered lesser criminals, are much worse than this cult.
What gets me is that people are reacting to this pickets in the worst way possible, by getting emotionally involved and allowing their words to upset them. Instead, they should drown out their words with their own celebration of life. I'm talking blasting some music and having a good old flash mob, block party, county fair, rodeo, parade, or whatever people do. Why doesn't this happen very often? In my opinion, most people do not have a strong love of life. They hate their job, they hate their family, they hate their government, they hate their neighbors. Instead of being able to burst forth with happiness, they automatically respond with hate and fear. Most of the protests against these cults are mass protests, with a herd based mentality for safety. People are actually afraid of other people saying mean things, not because they are in danger, but because it hits a little too close to home.
The way I see it, both sides of these protests are filled with sadness, hate, and anger. This is the true tragedy of humanity, not that there are those who would seek to degrade and harm their fellow man, but that all too often, there are none to oppose them.