The claim under examination: the major religions are equally valid paths to the same ultimate reality, despite contradicting each other.
Standard · preponderance of the evidence, not proof
The verdict
That people in many religions are sincere and decent is strongly supported. That all roads lead equally to the same reality is possible, but strained and not established.
If you read nothing else
Respecting people is one thing; agreeing that all their contradictory beliefs are equally true is another. Pluralism can only reconcile the religions by climbing above them all and telling each which of its own beliefs to stop taking seriously. That is a worldview of its own, and it still owes us its evidence.