Serving god is the essence of anti-materialist, but nice shitpost commie
Serving God can be done diligently in all things. One of Martin Luther's biggest problems with the Catholic Church was their 'holier than thou' (paraphrasing greatly on that) attitude towards those who weren't directly involved in a religious life; thusly a lot of his writings and papers are against monks and monastery's.
Now, what I just said is essentially a strawman, but it does illustrate my actual point; monastery's are scarce now; communism is quite current, and during the 20th century, caused the death of 100 million people.
Communism, and the idea that "Everyone is inherently a good person", is the basis of the modern anti-materialist ideology. In the past, it WAS indeed that people gave up their material possessions to be closer to God, but now, the anti-materialists are giving one of the most anti-Christian argument's there is, being "Everyone is inherently good".