1. It is not for the Israeli government to attempt to create religious holidays, especially one celebrated by political speeches. If they wanted to observe a holocaust memorial day, they should do so by fasting and learning Torah.
2. Jews have a traditional “memorial day”, which is Tisha B’Av, which we observe in a traditional manner. We have never added memorial days for tragedies that affected only a portion of Klal Yisrael (not for the destruction of most European Jews in the 20th century, not the destruction of the Southeast European Jews in the 17th, not the destruction of Spanish Jews in the 16th, not the destructtion of west European Jews in the 12th).
3. Frum Jewish kids are extremely aware oh the holocaust and have it driven into them in excess. Most are unaware of such aspects as opposition of secular Jews to rescue efforts, or how many goyim actively opposed the Nazis. While secular Jews use the holocuast as an “identity raising” exercise, frum Jews probably have an excess of identity to begin with.