Fanatic.

Deuteronomy 6:17-18 KJV

[17] Ye shall diligently keep the commandments of the Lord your God, and his testimonies, and his statutes, which he hath commanded thee.

[18] And thou shalt do that which is right and good in the sight of the Lord : that it may be well with thee, and that thou mayest go in and possess the good land which the Lord sware unto thy fathers,

Hebrews 11:6 KJV

[6] But without faith it is impossible to please him : for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.

Titus 2:14 KJV

Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.

Diligent.

characterized by steady, earnest, and energetic effort :

Merriam-Webster dictionary. 2024.

Zeal.

eagerness and ardent interest in pursuit of something :

Merriam-Webster dictionary. 2024.

Fanatic.

a person who is extremely enthusiastic about and devoted to some interest or activity

Merriam-Webster dictionary. 2024.

Perhaps, if you are obeying God diligently and with zeal, as you must, and someone calls you a fanatic, respond with, "Thank you."