Meanings of foolish sentimentality in English

He seemed to me to be the victim of his own foolish sentimentality.

But we must not, in foolish sentimentality, excuse the girl from her duty to keep herself pure.

No, on the whole she decided that it was verging upon foolish sentimentality to contemplate the possibility of falling in love.

There was a time when the thought of such an act of flagrant and foolish sentimentality would have made him groan aloud.

It sprang from the similarity of tastes, and the frank, straightforward manner which marked their intercourse denied the existence of any foolish sentimentality.

"Your father made some of that furniture with his own hands," but the worldly-wise son, who had outgrown " foolish sentimentality," over-ruled her.