We would love to believe that high culture makes people better. But Nazi Germany (and many fellow travelers) deflated all that. High-brow elites caved in to the brutes. Among the highest brows of those days were the Berlin and Vienna Philharmonics. Look at Terry Teachout's "Orchestras and Nazis" which recounts the very sad story. It remains that how and why people turn good or bad is not simple.
Amos Elon's The Pity of It All elaborates all this. The author notes that Pre-Hitler, Europe's Jews assumed that Germany would be a safe place to be: German high culture would provide a haven.
On the brighter side, the NY Times book review of Toscanini: Musician of Conscience notes that the maestro made it a point to distance himself from Nazis and fascists. The review also touches on Toscanini's amorous affairs. If you think of his adventures with many women as not so admirable, you again to face up to the complexity of human nature.
From the book review, here is Toscanini: "Every time I conduct the same piece I think about how stupid I was the last time I did it." If you are an aware person and reach the ripe old age of X years, you will wonder how innocent you were at X-5 years. Perhaps this awareness marks the good.