A few years back, I started using a framework based on the openness and friendliness of its community (the tech was good, of course). That lead to a job with the framework's publisher, which lead to travel, speaking engagements, a self-published book, friends and acquaintances around the globe, and my current job. I'm not saying you can't or shouldn't use a language/framework if its community is arrogant. But, the benefits of finding the right community are well worth passing over the others.