Christianity (the body of people at large not the religion per se) at some point became more tolerant of other religions (to the extent of not murdering outsiders). When did wars fought in the name of Christianity end? What year was it? After Spain finished colonizing all the land around the globe? And what are some guesses as to why it happened? Dawn of new technology?
I am trying to draw parallels to Islam today, and see if it is likely that Islam will become tolerant of other religions.
They ended?
All sarcasm aside, the killings by/for Christianity largely ended as and when states became secular - from the American and French Revolutions onwards, basically. Blame the Enlightenment, not any tech.
And Islam used to be plenty tolerant of other religions. There’s no siingle upwards evolutionary trend there, I think.
There is still Christian terrorism, such as the IRA and anti-abortionists.
Snark aside - 1648. The Peace of Westphalia pretty much put an end to the religious wars in Europe, at least on any large scale. The Thirty Years War was the last major war where religion was the pretext.
Porthos: Why are we shooting these poor devils of Protestants? Is it because they sing psalms in French while we sing them in Latin?
Aramis: Porthos, have you no education? What do you think religious wars are all about?
The IRA? They’re not killing anyone in the name of Catholicism.
There is an unpleasant amount of anti-Islamic, pro-Christian evangelism behind US military involvement in the Middle East today.
No reasonable person would classify IRA actions as “Christian terrorism”.
You might as well classify the PLO actions as “Muslim terrorism”.
I’d argue that the Ottoman–Habsburg wars, then still ongoing, would still fit the bill, which would move the closure to 1791. That particular set of conflicts was definitely religious in origin even if not really such by the conclusion. Subsequent Europe-Turk conflicts being more secular in origin, but I’d argue that one was the last hurrah for the old Crusade impetus in Europe.
Better words are *Christianist *and Islamist - actions done in the name of religions but without a sound actual basis in their teachings.
Neither organization did squat in the name of religions. Hell, the (main) IRA was a Marxist organization, FFS.
The IRA wasn’t/isn’t primarily a Catholic group committing terrorism against Protestants? Yes, there was a lot of Irish nationalism involved, but it was on the basis of religious identification, right?
Learn something new every day, I guess.
Much of the hostility in the former Yugoslavia broke down to division between groups that identified themselves as Christian or Muslim.
Weren’t there cultural differences that were also separate from the religious ones? I mean, there had to be a way to tell that a group were Bosniaks vs. Bosnian Serbs vs. Bosnian Croats without pestering them with religious questions.
Do you understand that there’s a difference between “A Catholic group” and “A group of Catholics”?
Hopefully…
Of course. But isn’t sectarianism behind the nationalism they have always stood for?
Sometimes. Sometimes it’s the other way around. Most of the conflict in the last few centuries has been over economic factors, not exclusively religious ones.
Wait…you think that the US military involvement in the ME is primarily because of Christian evangelism?? You don’t think it has anything to do with economics or that oil stuff?? 
Because that’s what the OP is asking, i.e. ‘When did Wars Fought in the Name of Christianity End?’ (my emphasis).
But weren’t most of the “religious” wars in the previous centuries really fought for the same reasons?
Pretty much every war has had an economic reason for starting. But since 1648 or so they pretty much stopped advertising the religious trappings as a motivation.