Atheism isn't the thesis, The God Hypothesis is the thesis, which Dawkins does a good job at refuting. He doesn't and cannot disprove it 100%, but not being able to disprove something doesn't mean it's true. If you want to be rational about it, you must provide evidence to support your hypothesis.
What is your evidence that atheism is fundamentalist? What is your evidence that are limits to what science can explain/describe? What beliefs do scientists like Dawkins hold without any evidence, and despite evidence to the contrary?
Both sides can argue ad nauseum, its all been said and done before, there are plenty of arguments for absence of evidence and vice versa in atheistic literature in India.
Ultimately, the argument is, one cannot claim that God is a delusion unless one can prove it.
Atheists live in the same universe, bound by the same laws as everyone else.