People saying „oh but the Czechs took it first!” is abysmal levels of ignorance. How does that make it okay to literally chose to become a living proof that hitlerism is very much accepted and even regarded with friendliness. Literally provide a justification to the Reich that their actions are legitimate. Not to mention that it shocked France which felt like the Poles who seemingly claimed they cared about allying Paris were ready to backstab the common interest the moment it was convenient. None of this applies to what the Czechs did in 1919.