Great question and challenge
Meriweather
Let's look at some models in the past that brought unity in resolution:
1. The Unitarians and Universalists merged their two congregations and wrote out their Seven Principles that are general enough to explain "Truth Justice and Peace" as the secular equivalent of the Holy Trinity to avoid the signs of judging people for rejecting this as a condition or test of faith
2. The 13 colonies that were once fighting for their own sovereignty united to write out both the original Constitution proper as well as the world famous Bill of Rights, based on previous articles from state laws and influencing many other people and countries later
3. The UN Declaration of Human Rights
4. I am currently working with very thoughtful, dedicated and articulate people on either
A. A resolution between Green Party members and Georgists and perhaps Christian Libertarian and Constitutionalists on separating taxes by external and internal functions to stop civil wars and political abuses of party
B. A three point agreement between Theists and Nontheists to stop discrimination by one group against the other, including forming a team to conduct and publish medical and statistical studies on
1. Proving the correlation between forgiveness and spiritual healing
2. Proving that receiving this spiritual healing and restoring natural health does not necessarily convert Nontheists into Christians, but reconciling the meanings of religious terms into relative terms where people can still reach common understanding despite religious differences in perceotion or expression (what you seek to bring up here, which I agree can be done by agreeing to forgive our differences that may or may not change)
3. Then also using science to prove the difference between dark forces or energy versus positive life giving energy and prayers, and studying the hypothesis that only prayers in agreement with faith in God through Christ Jesus Authority can succeed in casting out "demonic negative dark forces" (or whether other religions can effect the same results statistically)