Black Magic (Jaadoo) and Jinn

Accusing someone of doing jadoo (black magic) without evidence

Q: 

1. According to Islamic ruling, is it permissible for an aamil to accuse a person of doing jadoo (black magic) by getting information from jinn, doing istikhara or using numbers etc.? 

2. Is the above mentioned things sufficient evidence to blame and accuse a person of doing black magic, when the accused person denied it? 

3. If the evidence is not sufficient then is it a major sin for the aamil and those who believe him to blame and accuse a person of doing black magic?

Accusing a family member of doing jadoo (black magic) without evidence

Q: A family was going through difficulty and they got in touch with a Moulana who does amaliyaat to check if it's jadoo (black magic). The Moulana aamil blamed Rashid in the family of doing jadoo. 

After hearing this, the family accused Rashid of doing jadoo on the family. They are mentally torturing him, because of this Rashid has gone into depression. Rashid denied the allegations but because the Moulana aamil has blamed him, they are not willing to listen to him or believe him. The family is also gossiping to others about Rashid doing jadoo. 

What is the Islamic ruling regarding the three people; 

1. The Moulana aamil who did istikhara or checked via Jinn then blaming Rashid of jadoo, 
2. The family accusing Rashid of jadoo and 
3. Rashid who is being wrongly accused of doing jadoo?

Pious people being protected from evil influences of shaitaan

Q: Mostly it is said that pious people (regular in prayer or other activities) are not mostly inflicted by spiritual diseases like magic/jinn possession/evil eye etc. rather sinful people are prone to these. But some ruqya experts say that pious people are more prone to these issues as Shaytan attacks more on them than sinful people and also Allah also tests them more than sinful people. Which explanation is more correct?