Mr Murrell,
You obviously don't know many atheists or at least have never bothered to get know them.  I and many of my fellow atheists give generously not only during the holiday season but all throughout the year.  We not only donate financially but also donate our time.  We do so not because we believe we will be rewarded in the next life, but because we believe helping others is the right thing to do.

We don't feel the need to proselytize when we give or crow from the top of the mountain  that we are atheists doing good.  We don't wear t-shirts saying :ATHEIST HELPING.  We go about our charity without fanfare for the most part.  

Maybe if you stepped outside your church and did  some charity for some other organizations like Red Cross, Doctors without Borders, Amnesty International, Oxfam, etc - all secular charities - you would see atheists doing good work for others.  

For someone with a PhD, you should know better than to make blanket statements without any proof