Nothing wrong with getting information from biased sources, as long as you acknowledge the bias and read counter arguments.
I think a good place to start is what advocates for this relationship claim. As staunch proponent of Palestinian rights, I think a good starting point is to simply read what AIPAC says about this relationship: https://www.aipac.org/policy-relationship just know they have a vested interest in exaggerating how good this relationship is and lie about how important it is to strengthen it.
