Satanists (I mean them when I talk about his followers) say: they say that they will kill everyone, and we will be rewarded for our faithful service.

Calling Satanists followers of the Antichrist is the same as calling inquisitors followers of Christ (but please don't say that they were, fear God ;) )

Probably, they are specifically raised like that....

No, it's just that very few normal people go there in the first place. Normal people prefer to do what they should be doing, what God commanded them to do. To sow bread, to graze cattle, to have children, and not to talk nonsense about God and the Devil and also collect money from gullible parishioners.

Well, firstly, Hitler killed more people than Christians - he killed millions, while Christians could not afford such a scale :D

What is the basis for such statements? Look up the statistics on executions in the Middle Ages, count how many people were killed during the Crusades and missionary activities (this should also include the conquest of America). Hitler is definitely evil. But the Christian church is a much more terrible thing. Hitler declared that he would destroy Jews, Slavs, etc. But in reality, despite the millions killed, he never destroyed a single nation. The church, on the other hand, erased states, peoples, civilizations, and cultures from the face of the Earth. And despite all this, everyone loves and respects it, although it's long overdue to open its own Nuremberg trial to review its actions.

Well, and secondly, followers do not always follow exactly, as you noticed - the Crusades and the Inquisition are a clear mistake on the part of the church, and also provoked by secular authorities.

When there are more mistakes than good deeds (by the way, give at least one good deed of the church in 2000 years), then this is no longer called mistakes, but a deliberate course.

No one has ever died from fasting (and from abstinence from women either), so give examples of when a person became seriously ill due to a lack of sex.

You really don't know much. Fasting causes great harm to the body, especially for children and the elderly. In my life, there was an example when an eighty-five-year-old woman had a stroke during a fast, although relatives constantly argued with her, telling her not to torture herself and eat normally. As a result, she spent a year and a half in paralysis and subsequently died.
And abstinence leads to many diseases, starting with ordinary prostatitis and ending with neuro-psychiatric disorders.

If it weren't for them, you would not know about the existence of God at all.

But that's really funny :D Every person, if they wish, will find God within themselves, and external influences, as a rule, only distance him from him.

I advise you not to think that a person must be a zealous adherent of the church in order to defend Christianity.

How can you not think that, when every word you say literally reeks of the entire set of Christian dogmas? ;)