What makes you proud of your religion?

World religions - pride and selfishness

And do not turn your cheek contemptuously to men and do not walk arrogantly on earth; for Allah does not love conceited boasters.

Islam, the Holy Quran, 31:19

Allah will not grant entry into Paradise to those whose hearts are filled with even a touch of pride. (…) However, pride is when a person rejects the truth, classifies others as inferior, looks down on them and treats them badly.

Islam, The Holy Prophet MuhammadSAW, Ṣaḥīḥu l-muslim

So build a living connection with your Creator. Do not laugh at anyone, do not mock, hold no grudge against one another, beware of envy and resentment, the panting of the tongue, avarice, lies, adultery, fornication of looks, evil thoughts, worship of worldly means, pride and arrogance, pride, selfishness, causing mischief , pointless debating. Refrain from all of these evils. Only then will you receive the reward from heaven.

Islam, Hadhrat Mirza Ghulam AhmadAS, Noah's Ark, p. 98

Pride comes before the fall and arrogance comes before the fall. Better to be humble with the humble than to share the booty with the proud.

Judaism, the Torah, Prov 16: 18-19

Humble yourselves before the Lord and he will exalt you!

Christianity, the Bible, Jak 4,10

If you want to get help, put aside pride. Even a touch of pride overshadows you like a giant cloud.

Shintoism, oracle of Kasuga

A fool who sees himself as stupid is wise indeed;
If he thinks himself wise, he always remains stupid.

Buddhism, Dhammapada 63

The mighty proud eventually degenerate into their own arrogance.

Sikhism, Adi Granth, Gauri Sukhmani 12, M. 5, p. 278

Avoid all pride and envy, give up all ideas of "I" and "mine".

Hinduism, Srimad Bhagavatam, 11.4