Yesterday, he posted at Redstate on the fact that a number of student visas have been issued to Saudis and Muslims.
One quote from his response to a comment reveals what must have been the real reason that he was so upset with Lieutenant Colonel Peters for that column:
Your faith in the American education system is rather touching. I do not share it. I've been on record for a complete cessation of all Muslim immigration for well over a year now.
Time for me to go on record, Mr. Cella: I think your reaction to Colonel Peters' column was the reaction of a man who has read the denunciation of conduct and recognized he was one of those that was being rightfully denounced.
The last time I checked, the First Amendment did not have an exemption that excluded Islam from its protections.