I'm fine with Baha'is living up to their highest ideals and goals. Unfortunately, that includes "teaching" others about the new message from God. And, unfortunately, it contradicts what people in the other religions think is true.
Can a Baha'i honestly go to a church or temple of another religion and say that they believe the same as those people? No, Baha'is don't believe in many of the doctrines of the other religions. That is all a lot of us have been saying. Baha'is believe in a Baha'i interpretation of all those other religions. Which means, Baha'is don't agree with what those people think is true. And on and on it goes. Baha'is act as if they do. And we keep telling them, no you don't. And you don't.
Go to a Protestant Christian church and tell them that Jesus is physically dead, that he didn't physically rise from the dead, that all those verses that say he did are wrong. It wasn't a physical resurrection. It a symbolic resurrection.
Your beliefs are different. They might be true, but that would make some of the other religions beliefs false. So why not make it clear from the start, and very obvious, that Baha'is believe every other religion has had things added into them that are not true and did not come from God. And, were not in the original message of the prophet of that religion. And then, make it clear, that Baha'u'llah tells us, in essence, what that "original" message was all about. Peace, love and unity and that one day the Glory of God, was going to come and fix everything. And today is that day, no, actually, 150 years ago was the day. Baha'u'llah has come and brought a message that will, if applied, lead to peace, love and unity.