The Passuk says not to make on yourself a bald spot or a laceration on your skin, because you are a holy nation to Hashem. Do you know why we don’t sin? Because we are proud of ourselves! 'ה יֵכְרַדְבּ וֹבִּל הַּבְּגִיַּו lifting your heart in order to serve Hashem is all over the Torah. Kosher Ga'ava is #1 in Yiddishkeit. We are greater than all the nations and therefore we don’t act like them! Do you know why the Germans had such a power to start two world wars, which caused massive destruction and cruelty?
Because they had healthy self-esteem, and they believed that their Aryan race was superior to all others. They said: “Deutchland Iber Alles”, i.e., the Germans are greater than everyone. And do you know why they picked on the Jews more than any other nation??
Because the Jews are the true superior race, and they are their real competitors! Like it says about Eisav and Yaakov: םֹאְלוּ ץָמֱאֶי םֹאְלִמ תולדות כה כג When one nation falls, the other will rise. When a Jew doesn’t realize that he is superior, then Chas V'shalom he gets Nazis; to take over his job, Rachmana Litzlan. The Jew is getting punished for not holding from himself, and not realizing that learning Torah and doing Mitzvos is the greatest privilege.
For good reason, Novardok, Slabodka, and Chassidim held themselves high. Where does Reform and Haskalah and Zionism come from? When a Yid doesn’t realize that he’s superior and he’s got it all. So he starts imitating Goyim and Chanfaning them.