A Machlokes over ruchniyos can also cause more serious machlokeses, You know the old joke there are 2 jews on a deserted island. How many shuls are there. The answer is 3. One each of them wont go to and the 3rd neither of them will go to
A Machlokes over spots everyone knows really isnt serious and they can still be friends. Everyone knows its just trash talk
Better to have a machlokes over something not serious and be friends than have a machlokes over something serious and cause serious Sinas chinam