UC:  Your post, IMO, would be quite appropriate in an elementary Sunday School class. 

 I presume nothing......I don't know if God or god or gods exist(s).  I live my life following the moral values I developed over my 75 years.  I presume you do too.  God or god plays no role in my decisions....he/she/it/they likely play a role in yours...both are fine with me.  

I'm polite to Jehovah's Wittnesses, Mormons and others who come to my door to preach to me.  However, I don't engage with them... I have no desire to question someone's religious beliefs.....their beliefs are their business, as are yours.  .....and, as are mine.  Gary Crum