Abraham was the father of the prophets, worshiped the God Allah, who created the earth, the Heavens and everything in-between. Allah is the God who created and sent his messengers to people; those messengers were Noah, Johan, Abraham, Isaac, Jacob, Moses, Joseph, David, Solomon, John of Baptist, the Virgin Mary, Jesus and Mohamed.
All of those messengers worshipped what their father Abraham worshipped, the one and only true God. Now, there are billions of people around the world who believe and worship the same God who was worshiped by Abraham.
There are some differences occurred between followers of the heavenly religions due to changes in the interpretations and philosophies, but the reality of a true one God never changed. The creator, the one God, the only one worthy of worship is recognized in all three major heavenly religions, Judaism, Christianity and Islam. Regardless of the political conflicts between them, they should unite in the name of the one creator and in belief of Abraham as the father of the prophets.
Now, Muslims are criticized by the presence of some extremists in some countries; however, it is often the presence of Christian extremists in the past such as the Nazis is often unmentioned. The use of religion and political ideology caused many civil wars in the world history. It is clear in the Quran that Muslims should never obligate the people of book to change their religion and should discuss and debate kindly and with good manners. Muslims are ordered in the Quran to never harm any non-Muslim except for self-defense when physically attacked with the same level of harm, and even then it is preferred that Muslims remain calm, patient, and peaceful.