3:200 O you who believe, you shall be steadfast, you shall persevere, you shall be united, you shall observe GOD, that you may succeed.
What does unity have to do with success?
Real submitters are not dividers they unite the believers and won’t be the cause of division. In order to be united we need common ground. In regards to God we need to have common belief in God.
[ 30:32] (Do not fall in idol worship,) like those who divide their religion into sects; each party rejoicing with what they have.
Mark 3:24-25
24. If a kingdom is divided against itself, that kingdom cannot stand.
25. If a house is divided against itself, that house cannot stand.
59:14 They do not get together to fight you unless they are in well-shielded buildings, or behind walls. Their might appears formidable among themselves. You would think that they are united, when in fact their hearts are divided. This is because they are people who do not understand.