The German Antisemites

The שו"ת דברי מנחם  (R. Mendel Steinhart z"l ) writes, "Germany is a civilized country and friendly towards the Yidden, therefore there is no reason to say (Mondays & Thursdays) "כי היינו לעג וקלס בגויים" and should be removed from the Siddur since it is not true and this might even create antisemitism". A few years later they also removed the תפילה of אב הרחמים from the 1831 edition, of the Heidenheim Siddur.  In its place, they printed  in German " The tefillah was made for the times of the Barbarians  therefore we removed it." The next edition of the Siddur, Heidenheim put it back in. It is very likely they did so  because the Reform Siddur was published at that time and they too removed the אב הרחמים.