He should be judged strictly by today's standards and mores.
Somewhere in the middle. (Please elaborate)
He should be judged by the standards and more of the time in which he lived.
There's a lot that Columbus can be legitimately criticized for, but not making it to India is not one of them. If you find yourself presenting that as a serious point, you're just piling on out of bias.
If, when defending your support for Donald Trump, and your response is,
"But but but... HILLARY!!!", then you lost the argument before you even began.
"A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murder is less to fear"
Cicero Marcus Tullius
"I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it." --Benjamin Franklin 1776
Early voting in Georgia. On the 20th of October this old Goldwater conservative voted against both Donald Trump and Hillary Clinton by casting my vote for Gary Johnson. Neither Trump or Clinton belong within a million miles of the Oval Office.