I think the interfaith dialog will be another attempt by human beings to solve the world's problems apart from God despite claims to the contrary. I wouldn't take part in one because I wouldn't compromise God's truth in order to be unequally yoked with people who don't trust in Jesus for their salvation and have never been born again by the Holy Spirit.
While people can get together and do "some" good in their time our problems won't be "solved" until Jesus comes again. I would rather join with a non-religious charitable organization than to give tacit approval to false religious systems.
John 14:6 Jesus said to him, "I am the way, and the truth, and the life. No one comes to the Father except through me.
Acts 4:8 Then Peter, filled with the Holy Spirit, said to them, "Rulers of the people and elders, 9 if we are being examined today concerning a good deed done to a crippled man, by what means this man has been healed, 10 let it be known to all of you and to all the people of Israel that by the name of Jesus Christ of Nazareth, whom you crucified, whom God raised from the dead--by him this man is standing before you well. 11 This Jesus is the stone that was rejected by you, the builders, which has become the cornerstone. 12 And there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved."