I agree that it is far better for different faiths to get along rather than harass and persecute each other but that does not mean that "interfaith" or "multi-faith" proponents and activists are not full of shit. I'm sure many of the groups that have been advocating for this approach to religion are well meaning but they fail to acknowledge some innate problems with this movement. Ultimately, all religions are divisive. Cooperation can only go so far. A recent post on the Patheos blog Uncommon God, Common God inadvertently admits to this rather important and disturbing flaw.
In the very opening paragraph of "Don’t Compromise on Multi-Faith Dialogue" Paul Metzger states,
"Moreover, while multi-faith engagement seeks to safeguard against manipulation and bait and switch strategies of evangelism, it also seeks to provide compelling reasons why one would/should become an adherent of a particular religious tradition."
Reread that sentence and think about what he's really saying. Right away you should notice the contradiction. The latter part of the sentence is explicitly about evangelizing. So, yes, the approach is at least partially about "bait and switch." Many individuals and groups really are as concerned with converting and spreading their favored faith over all others. That is not cooperative or tolerant. The truth is that theists view their faith as having more merit and therefore all others are of lesser value. Why else would have continued to be part of their religion?