All of the Islamic countries in the Middle East consider themselves Suni and Shia, meaning they are all peaceful Islamic countries. The words "slam" and "Islam" literally mean "peace" and "submissiveness." (Linguistics are equivalently peaceful and submissive in Israel because the words are used there with similar frequency.) Islamic people rarely challenge one another. The most common greeting in most Islamic countries is “as-salamu alaykum," which means, “I feel peaceful towards you.” So people throughout the region pattern peace to one another all of the time.
Syria usually aligns most closely with Shia countries but is at peace with the Suni ones in the region as well. This didn't used to be true. But the Syrian government recently recognized the legitimacy of the Saudi Arabian government. There are consequently now optimistic diplomatic relations for Syria with all Islamic countries in the region.
The only government Syria doesn't currently recognize is the Jewish one in Israel. This is because Syria is sympathetic to Palestinians. Syria insists Palestine and Israel reach a peace accord before Syria opens up peaceful optimistic diplomacy with Israel. The Syrian government also owns the Golan Heights, an area presently occupied by Israel militarily, which can become fertile farmland for either country eventually. As a practical matter, Muslims can already settle in the Golan Heights as easily as Jews, because there are no restrictions on developing Muslim housing areas in Israel. But Syria has requested that the region be returned to Syrian Muslims.
It's possible improving Syrian-Israeli relations may occur gradually. But it’s also possible that phenomenal relations could develop quickly, because the Palestinian and Israeli governments have already declared that they are at peace with each other, and are now simply working out the details. The United States is encouraging this progress through generosity to both the Palestinian and Syrian governments. Both are benefitting from U.S. outreach. So both the Syrian and Israeli governments might cease deterring each other at any time, and choose reassurance, peace and generosity towards one another instead. The populations are clearly hoping for this result. It wouldn't take much progress for there to only be "joy, love, peace and generosity" in relations between all countries and populations (forever).