I'd like to step in here, but this is something that I feel strongly about.
I would not feel threathened, but I would be very angry to be forced to participate in a prayer I do not want to participate. I felt like that before, and I feel it even more now, because I would be forced into a prayer in a faith I do not belong to. Let these people do their prayers before the meeting, and leaves others alone.
I cannot see how not wanting to be forced into the prayers of others is being intolerant it it the faith forcing itself on others.But being intolerant of all beliefs other than your own and using sophistry to attempt to demean your opponents faith in their own belief systems is surely not holding to the high principles of science you profess to follow is it?
To me the tolerance is where you leave others be, with what they do or do not believe in, in the puclic space, and in their jobs.