Jesus is the messiah in Islam you inbred xenophobic dumbfucks.
Well, the context of "Jesus is the way" is John 14:6, in which it is stated that belief in Jesus—specifically his messianic mission and his sacrifice—is the only way to salvation. Even though Muslims honor Jesus as a prophet, they certainly do not share that theological doctrine. In fact, the Qur'an spends some considerable ink refuting it.
Doesn't make this act any less wrong or nonsensical, but it's not really an unchristian act to try to spread the gospel.
One of the most entertaining theological debates I've ever seen was a civil and academic debate between a Christian and a Muslim who debated which religion is the true one. It's amazing how arcane the arguments can become when both debaters accept certain religious positions. (For instance, the Christian argued that a logically consistent god has to be triune, since the property of being loving requires a loving person and a loved person. Hence, a god that only incorporates a single person is logically incompatible with being loving.) It's like watching comic book fans argue over fan fiction.