Indeed, the most worthy of Abraham among the people are those who followed him [in submission to Allāh] and this prophet [i.e., Muḥammad (ﷺ)] and those who believe [in his message]. And Allāh is the Ally1 of the believers.
The people who are most entitled to claim a link to Abraham are those who followed him in his time, as well as this Prophet Muhammad (peace be upon him) and those who have faith in him from this nation. Allah helps and protects the believers.