Hi,I am a Muslims (good for me ) but Islam does not teach us that Jesus was wrong. NO. The opposite actually. We believe that Jesus was a god-sent messenger/prophet and he was ordered to deliver Gods/Allah's message, which is to believe in God, worship God, and NEVER worship anything other then God, the only God. And he did. But he had enemy's, lots of enemy's and they did not like this message, so they tried to kill Jesus (according to some, they did) and kill his followers (which we see them as Muslims as well) and the book he wrote which is the Angeel, which we believe is a book from God just like the quran. And his enemy's did what they did and the result is the disaster we see in our brothers the Christians (this is our viewpoint, so keep that in mind) they have all kinds of beliefs that are outside Jesus's teachings, according to the Islam of course. Such as: Jesus will give you salvation, Jesus is a God (God forbid), Jesus is the son of God (No way), the concept of trinity, etc...
Also, we believe Jesus, and all other Prophets/Messengers do not commit any sins, and they do not make any mistakes, we see them as the perfect humans who are the role models of what we should be like. So Jesus is never wrong, just the lies about Jesus that are wrong.
This off course is what Muslims believe so sorry in advanced for the Christians out there.