There are Calvinists, and there then there are CALVINISTS:
"It is one thing to believe in the Doctrines of Grace, but quite another thing to accept all the encrustations which have formed upon those doctrines and also a very different matter to agree with the spirit which is apparent in some who profess to propagate the pure Truth of God." —Charles Spurgeon
"I admit that some called, Calvinists, are the most quarrelsome set breathing, this is the reason—while they have the main part of the Truth of God, many of them are leaving out something important—therefore God chastises them because they are some of His best children! It may be a sign of life that they are so eager after Truth that they kill one another in order to get it, but I wish they would leave off their quarrelling, for it is a disgrace to our religion. If they had more peace, I might hope better for the progress of Truth. Everyone says to me—“Look there at your Brothers and Sisters! I never saw such a set of cut-throats in my life! I never saw a Church where they have the Gospel, where they are not always falling out!” Well, that is near the truth and I am ashamed to confess it." —Charles Spurgeon
"Perhaps it is the Calvinistic doctrine which they have received, and then the five points are as dear to them as their five senses. These men will contend, not to say earnestly, but savagely for the faith. They very vehemently denounce all those who differ from them in the smallest degree; and deal damnation round the land with amazing liberality to all who are not full weight according to the balance of their little Zoar, Rehoboth, or Jireh: while all the while the spirit of Christ, the love of the Spirit, bowels of compassion, and holiness of character are no more to be expected from them than grapes from thorns, or figs from thistles." —Charles Spurgeon