Why do Rails developers hate Java so much?

It seems that any time I look at a blog that talks about Rails or Ruby for that matter there is always someone that has to bash Java. I feel that Rubyists and especially Rails developers have horrible attitudes and become purists. This is striking to me especially when I speak to these people and they don’t know basic programming constructs and principles. RoR has definitely lowered the bar for entry into programming, but that’s not necessarily a good thing. I use Java all the time and I think its great! Its fast, clean, and has a ton of documentation out there. It’s good enough for Google, Amazon, and the like—why hate it so much? I mean I like Rails but I hate the community. I just don’t understand the animosity… can anyone explain why Ruby and Rails developers feel they are so far superior?