I am just curious I guess as to the whole thing.
Below are the penalties and penalty administration for violations during free-throws......
Parts 1, 2, and 3 are self explanatory.....Part 4 applies to this original situation....
PENALTIES: (Section 1)
1. If the first or only violation is by the free thrower or a teammate, the ball becomes dead when the violation occurs and no point can be scored by that throw. The following out-of-bounds provisions apply if no further free throws are to be administered:
a. If the violation occurs during a free throw for a personal foul, other than intentional or flagrant, the ball is awarded to the opponents for a throw-in from the designated out-of-bounds spot nearest the violation.
b. If the violation occurs during a free throw for a technical foul, the ball is awarded to the thrower's team for a throw-in at the division line on the side of the court opposite the scorer's and timer's table.
c. If the violation occurs during a free throw for a flagrant personal foul or an intentional personal foul, the ball is awarded to the thrower's team for a throw-in from the designated out-of-bounds spot nearest the foul.
2. If the violation is by the free-thrower's opponent only:
a. If the try is successful, the goal counts and the violation is disregarded.
b. If the try is not successful, the ball becomes dead when the free throw ends, and a substitute throw must be attempted by the same free thrower under conditions the same as for the free throw for which it is substituted.
3. If there is a simultaneous violation by each team, the ball becomes dead and no point can be scored. Remaining free throws are administered or play is resumed by the team entitled to the alternating-possession throw-in from the designated out-of-bounds spot nearest to where the simultaneous violation occurred.
4. If there is a violation first by the free-thrower's opponent followed by the free thrower or a teammate:
a. If both offenders are in a marked lane-space, the second violation is ignored, as in penalty item (2).
b. If the second violation is by the free thrower or a teammate behind the free-throw line extended and/or the three-point line, both violations are penalized, as in penalty item (3).
c. If a violation by the free thrower follows distraction by an opponent, a substitute free throw must be awarded.
d. If a fake by an opponent causes the free thrower or a teammate of the free thrower to violate, only the fake is penalized.
In 4a, since both are in marked lane spaces, they are in immediate proximity to each other. Ignoring the second violation prevents the opponent from "intentionally" violating to gain an advantage.
In 4b, since the second violation is not in the immediate proximity, those along the lane line aren't likely to react to the violation. Also, the perimeters that are associated with FT violations are different. (they cannot enter on the release)
4c speaks for itself as the action by the opponent cannot hinder the thrower. (consistency with the rules regarding disconcerting acts)
4d is common sense.