Lincoln was hated by the slavers.
Roosevelt was hated by the Republicans, and Kennedy was hated by white racists.
We can see that two of those opposing forces have something in common, and we're compiling data on the third, so it's suspect when you knee jerk to their defense.
Also, I've never met Robin Williams or Dice Clay, but I know which one is funny and which one is crude, rude, and obscene.
Which brings us back to Trump.