Thinkers, for Heidegger, were those exceptional human beings whose destiny was to give word to Being, that which is.
It is said, with reason, that the universe is spoken into existence.
"In the beginning was the word..."How then are thinkers exceptional? Of whatever sensibility, creed or persuasion they happen to be, they are the exception rather than the norm.
And to think almost by definition means to resist.
It is much easier under conditions of tyranny not to think and therefore not be burdened with conscience and the need to resist.
But that is the norm created by normal people and normalising trends.