Do you genuinely believe that list is a rational, evidence based attempt to analyse an issue in an objective and critical manner?
If you claim you made that list years before 2015, and have 30 million AIDS death in Africa alone, I wouldn't be trying to accuse others of making up WHO figures that are published on their website.
HIV/AIDS
Global situation and trends:Since the beginning of the epidemic, 75 million people have been infected with the HIV virus and about 32 million people have died of HIV.
The overwhelming majority of all people who have contracted HIV/AIDS in Africa are not Catholics because the overwhelming majority of Africans are not Catholics. HIV is most prevalent in countries which have around 5% Catholic population.
You're quick to accuse others of bias and egotism, but perhaps might want to consider yourself first.
6 to 9%, not 15%. And no, many of the ones in which religion was a significant motivation do not carry the highest death tolls.
Axelrod & Phillips
Encyclopedia of War puts the death toll from religiously motivated wars as 2% of total war deaths (from 7% of total wars).
The total from
Attrocitology (included events other than wars too) is that 455 million have been killed in the top 100 'multicides'. Of these nearly 200 million come from the top 5 alone, none of which were religious.
The total for the 11 of the top 100 that were defined as religiously motivated was 47 million.
Number 100 on that list has 300,000 deaths, So to reach your "research based" estimate of at least 800 million, you only need to find another 3012 atrocities that killed 250,000 each
Anyway, for all pre-modern wars, religious or otherwise, numbers are most likely too high as:
a) Historical numbers were not remotely accurate (and are often all we have to rely on)
b) Most chroniclers were not even trying to be accurate as they were basically writing propaganda/hagiography
c) Even if they had wanted to, they had no ability to calculate accurately (e.g. even in the lucky rare situation you had some census info, this couldn't tell between people killed, people who simply moved somewhere else and numbers that reflect reduced governmental capabilities to conduct a census)
d) When we do have some evidence to go on, this most commonly shows historical numbers to be massively inflated
e) Many high numbers are caused by disease which may or may not have had anything to do with the conflict (we also don't add this on to modern numbers hence WW1 isn't recorded as having 115 million deaths)