Could it be that a broad view, a large view and a wide view the same, as in these sentences:
- He took a broad view of the situation.
- He took a large view of the situation.
- He took a wide view of the situation.
Are they different?
Broad and wide are synonyms and can usually be used interchangeably. They are both adjectives for a horizontal dimension.
In your example it is most likely being used metaphorically, it conveys the idea of a military commander surveying a battlefield and taking into account everything that is happening at the periphery, to left and right, as well as at the centre.
Taking a broad view is certainly idiomatic, perhaps clichéd.
Large is different, it can be applied to a variety of dimensions and quantities. It doesn't have the same connotations.