If respect disappears during disagreement, respect was conditional from the beginning.

Disagreement is where respect is actually measured, because agreeing is easy and requires nothing. If someone becomes dismissive, contemptuous, or cruel the moment you take a different position, then what looked like respect was really approval of your compliance. That is worth knowing early, though it usually only shows up under friction. It tells you what the relationship can hold.

Pay attention to how people treat you when you say no or hold a different view. Warmth that survives disagreement is the durable kind. And check that your own respect for others holds up under the same test.