I take it as somewhat as a personal insult when singled out to take off my shoes etc.
If, by "singled out," you mean everybody has to do it, then yes. Ironically, that's the exact opposite of what "singled out" means, but...whatever.
they search the least likely and allow those who more likely to pat down themselves.
1) Define "more likely"
2) Provide proof that those "more likely" are allowed to "pat down themselves" as you say.
It doesn't make sense, all of us should be treated equally and simple profiling would seem to work
Your statement is what doesn't make sense. The first bolded part contradicts the second bolded part.
Edit - Additional comment:
Approximately two million people travel by air to, from and within the United States each day. Some of them (I don't have the number) get subjected to advanced screening and pat downs either due to choice (opting out of the cancer/nude scanners), or due to some other condition that may require such. It is not unreasonable to suggest that this number extends well into the thousands (tens of thousands?) per day. Of that, every few weeks we get some article about TSA patting down a kid or a grandmother, and it becomes some media frenzy. It's very conceivable that out of the (tens of?) thousands of people that get pat downs and advanced screening per day, that one or more of them may feel that the TSA agent acted inappropriately. Of that number, some percentage of those claims (greater than 0 and less than 100) might be valid. Either way, it makes a good news story. What I don't get is how people can convince themselves that just because the 00.0001% of screenings that result in a news article tend to be of people of a certain age/racial/medical demographic, that everybody subjected to those screenings is of the same demographic.
As if, honestly, a 35-year-old man of Middle Eastern descent getting a pat down by TSA would even warrant a one-sentence report on a napkin, let alone a newspaper. There's no actual evidence that these screenings and pat downs are anything but random (which is the way it should be). However, if you actually let media reports be your only source of information (factual or not), then it would certainly appear that they only give pat downs to little old white ladies and their four-year-old granddaughters. But, if you actually believe that, then you seriously need to take a step back and reconsider what you use as your source of information on what's going on in the world.