I’d talk to the moderate Muslims if there were any.
You might be surprised. Millions of sharp and eager young Muslims are students in our universities today, often on scholarships. Wide-eyed tourists, eager to soak up American culture and make American friends. Sadly, fewer than 10% of them will ever get to see the inside of an American home. Our family has been greatly blessed by friendships with Turkish students. A sincere interest in them as people, a respectful interest in their culture and language, an honest effort to wrap one's brain around their mother tongue, can lead to wonderful experiences. To be frank, I've eaten more frequently in the homes of Muslim Turks than in the homes of American Christians over the last few years.
In 1945/46 Douglas MacArthur begged us to send 10,000 missionaries to Japan. A nation was ready to consider alternatives. Sadly, the missionaries they got were engineers -- and today Japan is one of the most resolutely secular societies on earth. We did better when The Wall came down -- our church was planting churches in Poland, Ukraine, etc. within a few years. Today, Russia is resolutely Christian in its public identity.
What will we do if God discredits Islam as dramatically and as suddenly as He did Soviet communism? Learning Arabic, Turkish, or Farsi is a long lead-time project. Let's get started! The future is as bright as the power and promises of God!