What is the way to avoid the escalating animosity between Muslims working in Islamic outreach due to disagreements on issues related to fundamental principles, and to correctly direct it towards the enemies of the Ummah?

The Sharia commanded unity and accord and forbade division and discord. There is praiseworthy and blameworthy disagreement. Some matters of disagreement between groups are of the praiseworthy type, yet some may deem them blameworthy and base loyalty and disavowal upon them, which disperses the Ummah. There should be no disagreement regarding the fixed tenets of the religion, and anyone who incites disagreement concerning them must be denounced. The way to achieve unity and eliminate discord is to return to the Qur’an and Sunnah according to the understanding of the righteous predecessors.