Beck has his positives and negatives.
You should probably be supportive because he's trying to encourage
people to be supportive of Israel.
You can't hold it against people like Beck that they are supportive of Netanyahu. Most consservative-type commentators have basically only heard of Netanyahu, Olmert, Barak, Livni and Peres. So of this group, they consider Netanyahu to be the most conservative. Also, Netanyahu
has done some interviews with Beck and Hannity in the past and has insisted to them that he's conservative. Therefore, people such as Beck and Hannity conclude that Netanyahu is the best possible choice for Israel.
So when there are conservatives who praise Netanyahu, they are also implying that they are supportive of Israel.
For example, in a recent interview, Hermain Cain quoted Netanyahu and was praising him. He is a supporter of Israel. Chris Wallace's question made no sense to him because the question contradicted common sense.
A criticism of Beck is that a couple weeks before Huckabee announced that he won't be a candidate, Beck trashed him on his show for about the first 10 minutes.
Beck claims that he'd like the US to be more supportive of Israel. But he does nothing to try and find candidates who are supportive of Israel.