Answer:

As Orthodox Christians, we are responsible to guard the True Faith, and to spread it.  However, we do not engage in condemnation of other Christian confessions, we just note that there are many and sometimes very significant ways they lack complete understanding of the True Faith.  More and more of us are converts to Orthodoxy from somewhere else, such as Roman Catholicism, Baptists, Episcopalians, Lutherans, even Muslims, Jewish people, Atheists New Agers and so on.  We can, in varying degrees, identify things along the path in those other faiths that rang true for us and led us here.  Once here, we have found that this is truly the 'last stop' on a spiritual journey looking for the Truth, and the beginning of the journey towards God, surrounded by the True Faith and in it.