Every religion or sect teaches its adherents to abandon evil and do good, to receive the virtuous qualities of its deity into their heart, or to give their heart to the deity. The way to reach the deity is the same for each religion. However, when a particular religion's devotees don't understand the truth, mistaken assumptions can arise. They may think that because another religion practices in a different way it is wrong and that only their way is correct. They propagandize and criticize and stir things up so that they can become pre-eminent with an increasing number of adherents. This is not what a Good Teacher with Dhamma would have taught, and sages would view such ideas with a dubious eye.
(Ajahn Thate)