The phrase “Islam is a religion of peace” gets bandied about a great deal these days – either by those saying that it is a religion of peace and islamic terrorists are an aberration, or by those who question whether islam is a religion of peace at all.
To be honest though, the phrase is irrelevant. You can have the most peaceable religion in existence and yet fundamentalist followers of that religion will resort to violence, and yes you can have a religion that calls for the torture to death of all non-followers, yet if the followers of that religion are peaceable nobody is at risk.
Questioning the religion as a whole is all very well (and as someone who would prefer that all religions disappear in a puff of logic, usually to be encouraged), but it does tend to encourage the kind of idiot who normally goes in for racism into attacking all muslims (and often sikhs as well) because of the sins of a few.
Muslims are just people; people with the disadvantage that they have been indoctrinated into a faith – not much different to christians, sikhs, hindus, jews, or zorastrians (and if I’ve left out your religion, yes I mean you too). Some are good people; some are bad.
But in the words of Steven Weinberg: “but for good people to do evil—that takes religion”.
But truisms like that are overly simplistic; religious terrorists are people who are convinced that they are good – probably better than their coreligionists – and who want to enforce their beliefs and standards of behaviour on others. And are prepared to do so in ways that most of us would call psychotic.
These people – the religious terrorists – are in all likelihood only a tiny minority of all muslims (or christians, …), and in a surprising number of cases are not especially well educated in their religion. In fact many of them are petty crooks, with a burning desire to be more significant than they deserve.
In the end, debating whether islam really is a religion of peace or not is pretty much a waste of time because it is irrelevant – even the religions with the most peaceful reputations have terrorists (major religions only).