“Be not deceived, God is not mocked. For what things a man shall sow, those also shall he reap. For he that soweth in his flesh, of the flesh also shall reap corruption. But he that soweth in the spirit, of the spirit shall reap life everlasting.”
Galatians 6:7-8
Frat bros aren't coming at this by taking a strong position on either side of the Israel/Gaza conflict. They are simply reacting with natural revulsion to leftists, who they rightly see as enemies to themselves and the flag that they love. It is not a political rally; it's guys who think America is good being organically disgusted by ugly freaks who think it's bad.
This is obvious.
Incentives drive behavior.
Until the loss of votes from ushering in vast numbers of illegal immigrants exceeds the likely gain of votes over time (as they are gradually legalized), the Democratic Party has a strong incentive to maximize illegal immigration.