In very general terms religions are divided into Christian and non-Christian, with further divisions of each. The only commonality between Christian and non-Christian is a belief of a God, (except Buddhists) other than that, there’s no connection. The definition of “Christian” automatically separates the system of beliefs, but the relationship is respectful on just basic human terms.
When it comes to various divisions of the Christian religion the conversation should flow easily, but too often it doesn’t. There seems to be more divisiveness between the Christian faiths than the larger religious groups. Perhaps because there is no contest between Hindus and Christians, as there is between Adventists and Catholics, for example . The antagonism between the different Christianities is basically social and historic. What hinders the communication even more, it seems, is the insecurity of each of the religious teachings. All the extraneous aspects of the particular “denomination” stand in the way of accepting the Christianity of the “other”.
Speaking from a Christian perspective, we should respect the individual, whatever religion they practice; but that doesn’t require a respect for their belief system itself - it can’t, if you prescribe to any specific religion.
The freedom Christianity offers is not a political freedom, but a freedom from politics and social acceptance. Jesus did not establish another division of Judaism, or another “church” called
“Christian”. All of Jesus’ teachings were directed to individuals, not as Jews or non-Jews (refer to the division between Peter and Paul), but to individuals. Jesus sought connection on a human level, not on a religious one. The precepts of the Sermon on the Mount are applicable to anyone just on the basis of the human “brotherhood”. Some of the specifics of that sermon were geared to the religion surrounding him, but the blessings were free for any.
The responsibility Christianity handed down was demonstrated by Christ through his life and death, & resurrection. His life - love toward all; death and resurrection - “God’s love for all”, our calling.