Jihad

The Prophet (ﷺ) said, "The one who looks after a widow or a poor person is like a Mujahid (warrior) who fights for Allah's Cause, or like him who performs prayers all the night and fasts all the day."

Sahih al-Bukhari

Having Muhammad as an adversary

"He who hurts a Non-Muslim citizen of a Muslim state, I am his adversary, and I shall be his adversary on the Day of a Judgement." (Bukhari)

One who hurts Muhammad and annoys God

"Whoever hurts a Non-Muslim citizen of a Muslim state hurts me, and he who hurts me annoys God." (Bukhari)

A believer in God in Islam

"He who believes in God and the Last Day should honour his guest, should not harm his neighbour, should speak good or keep quiet." (Bukhari, Muslim)

Muhammad warns

The Prophet (peace and blessings be upon him!) said:

“Whoever kills a person who has a truce with the Muslims will never smell the fragrance of Paradise.” (Saheeh Muslim)

Muhammad complains

“Beware! Whoever is cruel and hard on a non-Muslim minority, or curtails their rights, or burdens them with more than they can bear, or takes anything from them against their free will; I (Prophet Muhammad) will complain against the person on the Day of Judgment.” (Abu Dawud)

Who Muslims can't be friends with

 Allah only forbids you, with regard to those who fight you for (your) Faith, and drive you out of your homes, and support (others) in driving you out, from turning to them (for friendship and protection). It is such as turn to them (in these circumstances), that do wrong. Surat Al-Mumtaĥanah