Tolerance: sympathy or indulgence for beliefs or practices differing from or conflicting with one’s own.
This is the Merriam-Webster definition.
To be tolerant of another’s beliefs is to acknowledge that they have a right to hold those beliefs. It does not mean that you must respect those beliefs, nor is it a sign of intolerance to belittle or denigrate those beliefs which are without foundation, held without evidence.
An individual can be shown respect as an individual, even if that individuals belief system is baseless, and without foundation.
Open minded: to be receptive to arguments or ideas. It does not mean acceptance of those ideas or arguments without facts or evidence to back them up. It is not Close-minded to be critical of unfounded baseless arguments, ideas, or beliefs.
Most requests for open-mindedness from those proffering unfounded claims lacking evidence are really requests for gullibility. If a request for open-mindedness is not quickly followed by information backed by evidence then the request is in truth merely a plea for you to accept the idea , claim, or argument, on faith alone.