But, it didn't matter how good his preaching was, some people still did not like his sermons. :) It is noteworthy that he spent most of the war in prison, and then in a pit in the prison yard. He was seen as a rebel and guilty of treason for speaking against his country. Then, after his country had lost the war, just as he had prophesied, he was taken in captivity with the rest of his countrymen, (but treated well until his death as the enemy thought he was on their side too.) Jeremiah had a lot to say about how to deal with "looks" people give you, and the words, since they came directly from God, are good advice for every Christian in any situation.
Jeremiah 1:8 Be not afraid of their faces: for I am with you to deliver you, says the LORD.
Jeremiah 1:17 You therefore prepare yourself, and arise, and speak unto them all that I command you: be not dismayed at their faces, lest I confound you before them.
Jeremiah 1:19 And they shall fight against you; but they shall not prevail against you; for I am with you, says the LORD, to deliver you.
I will add one more from another prophet, Ezekiel, which was similar.
Ezekiel 2:6 And you, son of man, be not afraid of them, neither be afraid of their words, though briers and thorns are with you, and you do dwell among scorpions: be not afraid of their words, nor be dismayed at their looks, though they be a rebellious house.
It's great if everyone loves your faith, and all your acquaintances are overjoyed, but even if they are not, we know whose face really matters. People are human, and are prone to changing their minds like the trees change their leaves. But God never changes. Malachi 3:6 Keep your eyes on Him.