Theres a pretty decent article that Sean Gasperetti wrote earlier this year about how Christians should navigate disagreements... when I first read it (right at the time the election cycle was really starting to heat up), I thought "this applies to politics as well"...
In a nutshell, Gasperetti says most things we disagree over dont really matter, and we should celebrate our diversity of thought and welcome those sorts of discussions amongst ourselves (level 4 conflicts)..
then there are things that are worth debating (sometimes heatedly), but that we can all still acknowledge that while we are disagreeing, we are all still among the same body and same fundamental belief system (level 3 conflicts)..
Next up are "division" issues.. these are the things that see churches (and political parties) divide over.. we might all still see ourselves as "Christians" (or Republicans.. or Democrats), but we are definitely not in the same fellowship (think "The Squad" vs centrist D's... or "Freedom Caucus" vs centrist R's)... or in Church terms, Baptists vs Catholics vs Lutherans... (Level 2 conflicts)..
And then, lastly there are Level 1 conflicts (to die for type disagreements).. from a faith perspective, to deny certain "truths" clearly demonstrates you are outside of the boundaries of gospel orthodoxy... If you dont believe that "God" is the creator of all things, or that Jesus was the Messiah.. then we clearly do not share the same faith.. From a political perspective, if you desire a monarchy, an oligarchy, or an autocracy, you clearly do not wish the US to be a Constitutional Republic..
In a world marked by competing beliefs and perspectives, we Christians also find ourselves engaging in discussions that sometimes lead to disagreements. However, what sets us apart is (or, should be) our commitment to navigating these differences with grace and humility.
reacheverett.cc
Personally I think a number of self proclaimed "Christians" actually are not (sadly).. They dont actively practice their faith.. and dont even realize that some of their beliefs are clear level 1 or 2 issues that would see them separated from their church (or at least their denomination) if they actually understood the tenants that the church stands and where those match up with (or dont) their beliefs, morals, and ethics.. They may truly believe themselves to be "Christians".. they go to a building called a church every now and then.. they can recite most of the 10 commandments from memory, etc.. but beyond that theyve never really bothered to try to understand much more than that.. and merely saying "I believe Jesus was the Messiah" doesnt mean in the depths of their hearts they really believe it (much less understand what that calls them to do, how they are to live, etc..etc..)..