When I was still conducting studies with a Congolese family, the father of the family once told me that when they were still in Congo, they saw that the JW's there were taking good care of each other. But literally only to each other, not other people. He asked me why JW's only helped themselves and not the ones outside the faith. I used Galatians 6:10 ''Therefore, as we have opportunity, let us do good to all people, especially to those who belong to the family of believers.'' (After having left the JW's I see that this verse is in no way a justification for only helping fellow believers, but I remembered this being told in my own study with an elder, that's why I told the same to this Congolese family).
This Congolese father saw people in Congo that were non-JW's who were lacking basic needs, such as food and clean water, and saw them basically starving, he saw that they just did not get help or food or anything, whereas the JW's were only there to help people within the organisation. Some time after I had this conversation, an elder couple (pioneers for many decades) asked me how the study went with the Congolese family. I told them that they were uncomfortable in the fact that they saw in Africa that non-JW's were not receiving any help at all and that JW's only cared for themselves.
This couple said to me LITERALLY: God only helps the JW's because we are the only ones praying to the true and right God. The non-JW's pray to a false and imaginary God, and that's the reason God does not listen to their prayers, and that is why they lack food every single day whereas the JW's get listened to and receive their food.
Completely sickening and evil thought IMHO, but that, apparently, is the thinking of JW's.
(Unrelated to the topic about the prayer: no surprise that there is this big growth there in Congo when you hear these kind of stories. Why would you want to belong to the organisation? For literal food or spiritual food? My guess is that most of them there are in the organisation because they need the literal food)