There are tens of thousand(s) (at least) known crystalline materials. How many of these have you checked to make the claim that "almost every crystal"?
Of course, if you make the "around" wide enough it will true for any angle.
Besides, the angle depends on the wavelength of the x-rays. Change your x-ray tube and the angles will change. So the 32 degree value cannot have any special meaning.
However, all ten thousand (s) of crystalline materials fall into 230 space groups only. out of that, many systems have peaks near 32 degrees. Very less number of systems have peak in the range of 20-30.
I should not have used 'almost every'.