Do Buddhists think other religions are wrong? I appreciate that religion can be many things but I want to consider the more soteriological aspects of religion. If we can take as a premise that religions including Buddhism have a strong concern about salvation - this would mean that Buddhism and other religions have competing views on this matter. Do Buddhist texts and Buddhist teachers think that other religions are wholly wrong in this regard or maybe partially right or even perhaps everyone is correct in some sense?

I'm particularly interested in references for reasonable authoritative texts or quotes from teachers either ancient or contemporary. Also are certain schools of Buddhism more open to other religious views and perhaps other ones more exclusive in their views?
In Buddhism you have to straighten your views. In this process there may be times where you new views might start contradicting your previous beliefs or that of established religions. There are 3 stages to straightening your view:


You learn the Dhamma and see that this sounds right
You see it is logical
You practice and empirically verify and see that it is in fact true.


As a person taking the path you need not put aside any views as right or wrong to start with just because it is said so. Through logic and practice you start seeing things clearly then you can straighten your views. When you experience some thing sometimes even a a firm believer in Buddhism you would start seeing things in a new light and sometimes see your initial conceptual understanding differs from reality.

Hence the Buddhist position would be that conceptual / philosophical understanding is flawed. Your understanding is right only with regard to what you see at the experiential level. Hence any philosophical / conceptual aspect of any religion including Buddhism cannot be absolutely right.