King (with help from speechwriters) wrote a pretty speech. But it was PR propaganda, calculated to resonate with the white middle and upper-middle classes. It did not necessarily reflect King's actual views.
Conservatives love to drape themselves as the true followers of King. But I'm old enough to remember North Carolina GOP Senator Jesse Helms's and Ronald Reagan's opposition to to making King's birthday a holiday in 1983. So too conservative radio hosts like Bob Grant. And with good reasons. King isn't the saint modern conservatives like to paint him as.
Didn’t Ronald Reagan sign the bill that created the MLK holiday?