The 'supposedly offending comment' was indeed 'personalized' - firstly to 'Caiside' (to whom you were replying), and then by implication to all the signatories of the letter to President Trump. You were suggesting that all of them (i.e., those persons) prefer "to wax global than to really do the harder work of friendship right next to us".
Or, if not those persons, then who did you mean?
But I do agree that there was no need to say your comment was pompous. One man's pomposity is another man's normal mode of delivery. We are not all made the same.