Shtayger,
Your concern should be waht is best for your son, not what the friends in your circle will say.
My grandnepew went thru thst stage. My niece, who is yeshivish, decided to let him go thru his ” pink shirt’ stage without drawing a line in the sand because he continued to learn, and showed no rebellion in other areas.
The phase eventually passed and now he is in High school, well adjusted, happy and a top learner.