the technique or practice of responding to an accusation or difficult question by making a counteraccusation or raising a different issue.
The choice to vote for Biden is linked to the choice to vote against Trump. They can not be separated from one another. To do so is to be disingenuous. We live in a democracy with a two party system. The Republican party is disproportionally represented by our electoral system and win with low voter turn out.
Since we can not separate the choice of voting for Biden and rejecting Trump, it is justified to bring up what Trump and the Republicans would do. If we want any chance of the US demanding a ceasefire then we need to reject the Republican party who will blindly support Israeli no mater what.