“Why do some historians seem intimidated by the question of a traditionally Hebraic population of Ireland and Britain?”
Probably because it’s the “Lost Tribe of Dan” fantasy that has zero genetic, linguistic, or cultural evidence.
The Romans who invaded Britain in AD 43 would have noticed.
All opinions are based on one or more premises.
One of the most unexamined of premises is that we can trust what we’re told by the experts and the establishment.
The first question is: How much of what we’ve been told is not actually true?