Briefly,
Kiekegaard is wrong but VERY good.
Hegel is wrong but important.
Heidegger is wrong but very very very good.
I don’t know from Jaspers.
Sartre doesn’t float my boat at all.
Yes. “Sanctification”. Yes. Eternal Justification projected onto/into time.
Yes, I meant to say that Schaeffer was not calling these people bums, he just disagreed with them and noted their importance. About Kierkegaard, I think Schaeffer even said that he would have been disappointed at what his philosophy has led to.