It would be difficult for one so ___ to believe that all men equal are irrespective of caste, race and religion.

It would be difficult for one so intolerant to believe that all men are equal irrespective of caste, race, and religion.

The synonym of Defer is 'postpone'.

• The word intolerant means not being tolerant enough of beliefs or certain views.
• When a person is being termed as intolerant, it means that they are not willing to accept or understand certain views or beliefs that differ from their own beliefs.
• Such a person often does not accept others' views and is unwilling to give others permission to express themselves, mostly in terms of religious matters.
• The meaning of the word postpone is to delay a particular action or plan, or a particular proceeding.

Hence, the correct answer would be It would be difficult for one so intolerant to believe that all men are equal irrespective of caste, race, and religion.