You cannot learn from S.A.M that muslims are liars, if you think S.A.M is a liar then you have learned that an individual human being is a liar not an entire 1/6 of the human population are liars.
Religion is as much of an addiction as your quest to destroy it is.
Saying that Atheists are liars is in the same league as what you say about religious people in general. Humans are liars, Jews, Christians, Muslims, Atheists, Agnostics, buddhists, and any other group of people. Everybody lies for good or for bad deception is a huge human trait that we used to use for survival and hunting, but now we use it to get what we want or provoke what we want in others.
Not every muslim heeds the words of the holy scriptures 100% and follows the words blindly, each individual has his or her own path in following any set of beliefs. It is the same for Christians not every Christian follows every single word of the bible.
If individuals bother you with the way that they are then it would be wise to address the specific individual on the matter, instead of in-turn saying "well your a muslim/christian you did (insert offence here) so that must mean every muslim or christian is the same and I don't like any of you". We are all humans Theist or Atheist we have more in common with each other than differences, hostility on both ends of the spectrum will only lead to more hostility and suffering. Can you not see that if we act like this with each other we are no better than little children bickering in the school playground, "im better than you, your stupid".
Alot of people need to grow up, Adults and elders should set good examples for the younger generations to follow. If the older generations act as foolishly as the younger ones then what hope is there?
When you are stuck in your own circle of thoughts and egotistical beliefs it can be very difficult to realize when you are being unwise. sometimes it tkes an outsider and neutral to point out the folly of your ways. peace.