The phrase "allow him to divert" is correct and usable in written English.
You can use it when giving permission for someone to change the direction of a conversation or activity.
Example: "I understand your concerns, but I think it might be beneficial to allow him to divert the discussion to a more positive topic."
Alternatives: "permit him to change" or "let him redirect".
George Osborne has told the cabinet that a series of Whitehall departments will face an extra 1% cut over the next two years to allow him to divert £2.5bn towards capital spending and to put £1.2bn aside for the next spending period in 2015-16.
The administration has said such a declaration would allow him to divert other government funds for wall construction by the military.
In view of Zaccaria's character, the Pope expressly warned Henry of Asti not to allow him to divert the crusade in a bid to recover Chios, and authorized Henry to replace Zaccaria if he deemed it necessary.
Not long after, according to a civil lawsuit filed against him and others in New Jersey Superior Court in 1988 by one of the clinic's founders, Mr. Zeltser helped hatch an illegal takeover of the clinic that allowed him to divert its assets for his "own use".
However, where others may have fallen victim to the negative influences of a tough neighborhood, Shawne's strength and intuition allowed him to divert the negativity and channel his energy into a positive outlet; football.
It would allow him to unilaterally divert billions of dollars to a border wall and presented his Republican allies on Capitol Hill, who labored on a legislative compromise, with the excruciating choice of either defending their institution or bowing to his whims.
Countries with the sort of institutions that allow them to divert resources to adaptation will do so anyway; those without won't, even if showered with support from others.
Moreover, access to rice rations allowed them to divert some of their rice lands to growing vegetables and other crops.
The president wanted to allow workers to divert part of their Social Security payroll taxes into private accounts.
So he would allow workers to divert an unspecified part of their Social Security payroll tax to private investment accounts.
