Somewhat.
What I believe is that NATO members should be careful when choosing their alliances. Turkey and Israel should be fine (to be honest, they're just being childish; they are both free and democratic countries and hopefully this will blow over soon). However, a deal with Iran or Pakistan or something like that could be problematic, unless it's a whole-NATO deal.
In the very unlikely event that one country attacks the other, the focus should be on defending the victim, as it always is. As much pressure as possible should be put into preventing a war, but they should not pick sides.
Also, Israel ought to be a NATO member.







