I’ve talked to some of my Muslim friends about such words. They call it nonsense, rhetoric, not representative of their own beliefs. Of course, like many Christians, they would like to see others join their faith. But never by force.
Really, you spoke to them of the quote from the former PRESIDENT OF BOSNIA?
Do they think these words from the koran are "nonsense and rhetoric"?
Qur'an (5:51) - "O you who believe! do not take the Jews and the Christians for friends; they are friends of each other; and whoever amongst you takes them for a friend, then surely he is one of them; surely Allah does not guide the unjust people.""Of course, like many Christians, they would like to see others join their faith. But never by force."
Qur'an (5:80) - "You will see many of them befriending those who disbelieve; certainly evil is that which their souls have sent before for them, that Allah became displeased with them and in chastisement shall they abide." Those Muslims who befriend unbelievers will abide in hell.
If I were you i'd be careful around your "friends":
"Even a modern-day fatwa (on Islam Q&A) that warns Muslims against taking unbelievers as "sincere friends" permits infidels to be dealt with "in a kind manner in the hope that they might become Muslim."