Should he stop praying in the mosque because he fears for himself?

No File Exists
Check below answers in case you are looking for other related questions:
Salaried imam receiving a portion of zakaat collected
The evidence that it is obligatory to offer prayers in congregation in the mosque

No File Exists
Related Answers:
They delay Zuhr prayer – should he pray with them or pray by himself?
What should a person who joined the prayer late do, if the imam made a mistake and said the tasleem after the third rak‘ah of a four-rak‘ah prayer, then remembered and stood up to do a fourth rak‘ah?
Praying ‘Isha’ behind someone who is praying Taraweeh or Witr
Salaried imam receiving a portion of zakaat collected
The evidence that it is obligatory to offer prayers in congregation in the mosque

Recommended answers for you:
Is it permissible for husband and wife to remove their clothes when sleeping? What effect does that have on tahaarah (purity, cleanliness)?
Description of the funeral prayer
How to protect oneself against the evil eye
Ruling on kissing one’s wife in the street in front of people
Temporary and permanent tattoos – types and rulings