Unfortunately in some cases this is true.
In fact in some cases this doctrinal pride is even against others that hold to TULIP. For instance, CH Spurgeon once said that John Wesley despite being an Arminian never the less was a Christian. On the internet I have read many Calvinists be aghast at Spurgeon for saying this. Some even went as far as to question Spurgeon's salvation, while others questioned Spurgeon's knowledge of the doctrines of grace.

I would be interested in some examples that you have run into that prompted this thread.

Tom