The leftists are superb in infiltrating and undermining organizations, religions, you name it. But when conservatives leave the now corrupt situation, despite the bitter acrimony created by the leftists, the schism condemns the liberal side to wither and die.
This is both because the organization or faith has lost its meaning, purpose and spirit, subsumed by the leftist agenda. And though the leftists usually make off with the treasury, their way has no appeal to conservatives, nor those who truly believed in the original idea.
The other reason is that leftists are cheapskates and parasites, who do not contribute, only take. They have no righteousness or faith, other than their atheist pseudo-religion.
The evil ones win by destroying the Scouts. Thus depriving individuals of good guidance and a nation of good adults.
The reason the Right tends to lose - beside Original Sin and spiritual entropy - is that rightists rarely seek to infiltrate the enemy strongholds. We live and let live.
Rightists tend to be pioneers and libertarians; we seek freedom - hence the predominance of conservatives in the wide open spaces, pursuing independent enterprises. Contrary to the Big Lie about fascism, the extreme right wind tends toward anarchy, not any form of collectivism (which is what fascism is).
Leftists are herders through and through: Ganging up and taking over what the individual conservative producers made is as natural to them as ordering a half-caff soy-milk latte at Starbuck’s.
Walt Disney, Boy Scouts - it happens to them all eventually.