Trying not to make assumptions about people here, but yes, probably.
Many have been taught by abusive parents or figures of authority, or whatever shit television, that it's normal. "Some 'light' yelling is to be expected.", "Different styles of management/debate", "whatever works for them, I'm sure everyone does it a bit". What next? Corporal punishment? Like in the old days, when kids really respected their elders - or else - and were taught /right/ and women stayed in their place?
Those people need to be taught that no one, ever, should have yelled or should ever yell at them for being wrong or just disagreeing. It's not OK, it never was, it never is. Parents, friends, teachers, colleagues.
You spend 8 hours a day at work, if it's not a safe place, and you can find another job, GTF away as fast as possible, or have the perpetrators get the hell away, if you have this power.
The probability is unusually high that they personally yell at people in collaborative meetings.