Neville Chamberlain met with Hitler and judged him based on their one-on-one conversation. Chamberlain trusted Hitler based on this personal meeting and infamously predicted “peace for our time”.
Winston Churchill had to judge Hitler based only on his actions, because he never met Hitler personally. Churchill did not trust Hitler.
Less than a year after Chamberlain’s one-on-one meeting with Hitler, Hitler invaded Poland and began WW2.
Sometimes it’s better to judge people based only on their actions as seen from afar.