Which lines in this excerpt from act i of shakespeare’s romeo and juliet foreshadow romeo’s fate

TYBALT: This, by his voice, should be a Montague. 
{Fetch me my rapier, boy. What dares the slave 
Come hither, cover'd with an antic face}, 
To fleer and scorn at our solemnity? 
{Now, by the stock and honour of my kin, 
To strike him dead, I hold it not a sin.}

CAPULET: Why, how now, kinsman! wherefore storm you so?

TYBALT: Uncle, this is a Montague, our foe, 
{A villain that is hither come in spite, 
To scorn at our solemnity this night.}

CAPULET: Young Romeo is it?

TYBALT: 'Tis he, that villain Romeo.

Idon’t understand this and wym