E. Nussbaum said from his father not to use a cerain shochet based on his children not being on the right track. - if all kids are like that something's missing in father, & choshesh that his sensitivity to feel the chalaf is lost.
the Maggid meishorim explains what re'eh - seeing the blessing means & why the 1st passuk in re'eh starts in singular & ends L'fneichem - plural.
He says that brachah is an entity that exists, not just an occurrence & one with very good eyes can actually see it! So Moshe was telling the few individuals (in singular tense) with 'good
eyesight' to look & actually see the bracha & k'llalah that is being placed before ALL of kllal yisrael (plural tense) on har grizim & har eival.
Shechitah needs a very sensitive nail to make sure the tool that makes an animal appropriate to become one with man is smooth with no bumps to caus the animal pain in the process.
Presumably, that sensitivity is dependant on one's level of purity in bein adam LaMakom.
As R' Yisrael Salanter said, bein adam L'chaveiroh is a lot harder than bein adom LaMakom.
How much more carful must we be then to retain the sensitivity needed to be aware & avoid any sharp painful 'bumps' when bonding people into one!
Creating true ahava achva shalom & rei'us is an extremely delicate surgery & we owe tremendous hakoras hatov to those who bring people together as they skillfully make sure all is smooth.
Part of what's needed for the people themselves to bond, is a good measure of light heartedness & humor so that not every nuance should cause pain & we should not be oversensitive.
