is not the notion of being the religious is to preach the word, and love god and love thy neighbor? is not food pantries and charity hospitals one of this worlds BEST ways to show love to thy neighbor?
i think its completely acceptable for the non-religious to go to these things.. seeing it otherwise is arrogance and ignorance
on the flip side, when you start your car and drive to work, your really relying on engineering and math to get you to your point of interest. i would say if you were a true believer, "faith of a mustard seed so the speak" you could walk on water, move mountains, all the "if you were as complete as you should be" ideas here.
so to me what your trying to do is exactly this. You are not complete so you have to live with what the world gave you. And you see that as completely fine. I see it as irony. tbh, you should be WAY more devout. Follow the bible to the T. Not I will follow this and I will follow that, "if it fits into my everyday comings and going".
If you are to use the tools of the sinners or the heathens, or any amount of scientists that create things, be that advancements or what, and they are openly atheist, or partake in their reindeer games, I am sure the allmighty all powerful god that doesn't exist would say sorry kid, you got intoxicated with their perfume.