As a Christian, one may argue that prohibiting missionaries from contacting isolated tribes is necessary to uphold the biblical values of respecting human dignity and autonomy, and promoting peaceful and non-coercive evangelism.

Firstly, respecting human dignity and autonomy means recognizing that isolated tribes have the right to live according to their own traditions and beliefs, without interference or imposition from outsiders. Contacting isolated tribes without their consent can lead to unintended consequences, such as the spread of diseases for which they have no immunity, and the disruption of their social and cultural fabric. Even things like introducing western clothing, which can be a disease vector, can be an unloving act.

Secondly, promoting peaceful and non-coercive evangelism means recognizing that faith cannot be forced upon people. True conversion happens through the work of the Holy Spirit, and not through human persuasion or coercion. Contacting isolated tribes with the intention of evangelizing them can be seen as a violation of their freedom to choose their own beliefs and practices.

Thirdly, prohibiting missionaries from contacting isolated tribes does not mean abandoning them to their fate. Instead, it means respecting their right to self-determination and promoting alternative ways of helping them. For example, missionaries can work with local organizations to provide healthcare, education, and other forms of support that do not compromise the tribes’ autonomy and dignity.

Moreover, Christians may argue that the Great Commission (Matthew 28:16-20) does not require missionaries to contact isolated tribes, but rather to go and make disciples of all nations. This does not necessarily mean physically going to every corner of the world, but rather using every available means to spread the gospel. For example, missionaries can support indigenous Christian leaders who are better equipped to reach isolated tribes with culturally appropriate methods.

In conclusion, from a Christian perspective, prohibiting missionaries from contacting isolated tribes can be seen as a way to uphold biblical values of respecting human dignity and autonomy, promoting peaceful and non-coercive evangelism, and finding alternative ways of supporting them. The Great Commission can still be fulfilled through creative and culturally sensitive means that do not compromise the integrity of isolated tribes. And introducing diseases which wipe out a tribe is not walking in love.