That being said, the fact that Arab Americans voted heavily for Bush in 2000 suggests they are culturally conservative, but switched parties to oppose neoconservatism. An anti-interventionist Republican candidate such as Trump could potentially make inroads into the community.
Given the fact that Trump has called for all Muslims to register with the government and ban them from entering the country, I highly, HIGHLY doubt that he will make any inroads with them. And what evidence do you have that Arab Americans voted for Bush in 2000?
if Zogby is to be believed as an Arab-ran polling firm, Bush got about 45% of the total Arab vote in 2000 and amongst Arab Muslims it was around 42% to Gore's 31%, Nader probably got a large amount just for being an Arab himself.
http://www.nbcnews.com/id/6056602/ns/politics/t/arab-americans-turning-away-bush/The Arab American Institute's poll shows that a plurality of Arab Americans voted for Bush with 46% to Gore's 38% and Nader's (Who is Arab American himself) 16%
http://www.aaiusa.org/w121800