There is no strong or weak version of atheism. Atheism is a positive belief system and has been so defined by the supreme court. If a person wishes to align themselves with the position that there simply is not enough evidence for god then they would be agnostic like me.
Atheism and religion
Contrary to the opinions of evangelical atheists, atheism is a religion which has repeatedly attempted to take away the religious liberties of Christians in order to support their false religion.
Although atheists claim that atheism is not a religion the U.S. Supreme Court has ruled that atheism is a religion as it fits in with its definition, distinguishing between “religions based on a belief in the existence of God [and] religions founded on different beliefs."
History of Atheism - Conservapedia
Effect of atheism on societies
Atheism has a negative effect on societies culture (see: Atheism and culture).
Various social science studies, historical data and other data, demonstrate that atheism often has a harmful effect on individuals and societies (See: Atheism statistics and Christianity vs. atheism statistics).
History of Atheism - Conservapedia
According to conducted studies it really won't matter what Atheists believe or assert to take a stand on;
Atheists as a percentage of the world's population have declined since 1970 and atheism is expected to face long term decline.
On July 24, 2013, CNS News reported:
“Atheism is in decline worldwide, with the number of atheists falling from 4.5% of the world’s population in 1970 to 2.0% in 2010 and projected to drop to 1.8% by 2020, according to a new report by the Center for the Study of Global Christianity at Gordon-Conwell Theological Seminary in South Hamilton, Mass."
If it wasn't for the Christians that founded this country and who made the initial rules for this society to be founded on then we would not likely see anyone with the freedom to even try to claim an atheist stance. It is my firm position that if you don't want to deal with theistic people then you should not be afforded the rights that the country was founded on whose basis was on their belief that;
“We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”
If you feel there is no possibility for a creator to exist then you should live by the governing rule of evolution where "the strong survive" and the weak are eliminated. Assemble an army of atheists and take the US out then form your own rules to live by and you won't be arguing against their belief system while enjoying a freedom based on that belief system.