In what specific ways did the pope urge toleration? and why did he advocate accommodation or compromise with existing religious practices?

1. Pope encouraged Christian people to aid people with different religion to buld a temple for worship if they need to and to maintain peaceful relationship with followers of other reliigion no matter how different they are. Doing this would be considered as a massive gesture which conveys a society that could tolerate different religions

2. Mainly because the golden rule of Christian religion, treat other people like you want to be treated.
Many christians would definitely want the freedom to exercise their beliefs. Because of this, it is only fair if Christian followers also allow followers of differing religion the freedom to exercise their belief.