It is true that Murner is very severe and satirical towards Luther; in fact, all Luther’s opponents who wrote against him frequently made use of stronger expressions than became the cause they advocated, being incited and encouraged in this by the language he employed. The Dominican, Conrad Köllin, in his answer to Luther’s attacks on the indissolubility of Christian marriage, is a good instance in point.[399] The Dominicans of Cologne were particularly irritated by Luther’s insults, for at the very outset of the struggle he had called them asses, dogs and hogs.[400] That Luther’s scolding and storming grew worse and worse as the years went on has been pointed out by the Protestant historian Gustav Krüger, who remarks that Melanchthon could never “see eye to eye with him in this”; Luther, however, did not “by any means always reflect upon what he said, and he must not be held responsible for all he flung among the people by word and pen.”[401] Luther’s friend, Martin Bucer, strove to console himself in a peculiar fashion for the insults and libels which increased as Luther grew older. To the above-mentioned Ambrose Blaurer he wrote concerning Luther’s attacks on the Zwinglians: “These are terrible invectives and even calumnies, but if you take into account Luther’s character, the evil is diminished. He is by nature violent and accustomed to vituperation, and the abuse of such men (‘_conviciari assuetorum convicia_’) is not to be made so much of as that of persons of a more peaceable temper.” Two years later, however, Bucer confesses to the same friend his real concern regarding Luther’s outbreaks of passion: “It thrills me with a deadly fear (‘_tantum non exanimor_’) when I think of the fury that boils in the man whenever he is dealing with an opponent. With what utter rage did he not fall on the [Catholic] Duke George.”[402]