We are also astounded upon thinking of whether this movement (KC) will be killed by the asuras or will continue to advance without fear - as Devaki and Vasudeva were thinking if Krsna gets killed by Kamsa, although they knew He could not be killed

Expressions researched:
"we are also astounded upon thinking of whether this movement will be killed by the asuras or will continue to advance without fear"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

Devakī and her husband, Vasudeva, were assured that their child was the Supreme Personality of Godhead and could not be killed by Kaṁsa, but because of affection, as they thought of Kaṁsa's previous atrocities, they were simultaneously afraid that Kṛṣṇa would be killed. This is why the word suvismitā has been used. Similarly, we are also astounded upon thinking of whether this movement will be killed by the asuras or will continue to advance without fear.

SB 10.3.23, Translation and Purport

Śukadeva Gosvāmī continued: Thereafter, having seen that her child had all the symptoms of the Supreme Personality of Godhead, Devakī, who was very much afraid of Kaṁsa and unusually astonished, began to offer prayers to the Lord.

The word suvismitā, meaning "astonished," is significant in this verse. Devakī and her husband, Vasudeva, were assured that their child was the Supreme Personality of Godhead and could not be killed by Kaṁsa, but because of affection, as they thought of Kaṁsa's previous atrocities, they were simultaneously afraid that Kṛṣṇa would be killed. This is why the word suvismitā has been used. Similarly, we are also astounded upon thinking of whether this movement will be killed by the asuras or will continue to advance without fear.