"Nazi's", with the apostrophe indicates either a contraction or possession, but your usage indicates neither. The same is true all four times you typed it. (Same for "College's", which additionally should not be capitalized.)

But when you typed "Hitlers", you neglected the necessary apostrophe. (Also, “takeover” used in this manner does not contain a space.)

I’ll make a deal. I’ll be willing to study more about Hitler than I already have if you’ll be willing to study grammar and spelling.

Fair?