Delegates from the conservative Lutheran Church-Missouri Synod agreed on Thursday to continue its cooperative relationship with the Evangelical Lutheran Church despite the latter body's latest decisions on sexuality.
While the LCMS believes the ELCA's action last year to allow partnered homosexuals on the clergy roster is contrary to Scripture, the synod approved a resolution, affirming that "cooperation in externals with other Lutheran churches, including the ELCA, continue with theological integrity."
At the same time, LCMS delegates called on the Commission on Theology and Church Relations to "develop more in-depth theological criteria for assessing cooperative endeavors, determining what would necessitate termination of such cooperative efforts."...
1 Corinthians 8 9 But take care lest this liberty of yours somehow become a stumbling block to the weak. 10 For if someone sees you, who have knowledge, dining in an idol's temple, will not his conscience, if he is weak, be strengthened to eat things sacrificed to idols? 11 For through your knowledge he who is weak is ruined, the brother for whose sake Christ died. 12 And thus, by sinning against the brethren and wounding their conscience when it is weak, you sin against Christ.---NASB
It is much like supporting Promise Keepers... and indirectly supporting practices that a church shouldn't.