Whether it's true in that case or not, it frequently happens that someone will start to act like they disagree with you about everything, because they happen to disagree about a few issues. And that definitely can cause them to do things that they otherwise wouldn't do, just because you suggest that doing them is a bad idea.
Alternatively, the causal arrow goes in the other direction. People don't give your practical opinions much weight, but you don't realize the gulf until you have a flare up about ideological disagreement.
I agree that ideological disagree can lead to lower weight to opinions, but if the gulf is as large as OP described, then I suspect the blow up was a symptom, not a cause.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.