How can one NOT “judge”? Are you going to allow your children to befriend someone who watches TV? Someone who eats treif? Someone who is “friends” with opposite gender people? Someone who dresses pritzusdik? Someone who is a mechutzif? Someone who repeatedly creates chillul Hashem?
Are you going to say in all those cases, sorry I can’t judge them; Yankele my son, go be best friends with them! If so, you are a fool who risks spiritually killing your child.