The whole thing about Deltas having problems with emotionally expressice people is not so much the emotional expression, but the underlying intentions with those emotional expressions. Especially in the case of Beta, such expressions are considered by Deltas as boundary crossing behavior, and a forebode of more bad things to come. Deltas view Betas as people who act entitled in a way that puts Deltas at a disadvantage, and thus have the tendecy to withdraw from emotionally expressive people. Long story short: to Deltas, emotional expressiveness is a sign a bad things ahead, especially in a group setting.

This also explains why Deltas have less problems with the Fe from Alphas: Alphas emotional expression is not experienced as dangerous by Deltas.