If Hamas is launching conventional rockets on israelis,WHY israel bomb Gaza with DIME bombs & WHITE PHOSPHORUS?

Because they have those weapons and hamas doesn't. The whole relationship is built on a mive difference in military power, by trying to blame Israel for WAR CRIMES you take attention away from the real issues - The UN is never going to take Israel into account, so why bother banging on about it - deal with issues you can have an influence on.