> Do you think...?

Most don't. A few (and more of the swing voters) care somewhat. Good reason to not spend (waste) time getting picky on the details, eh?

> But why...?

Some combination of social signalling/performance - "look at my uber-ultimate loyalty to the anti-Israel cause!!!" - and an ancient human tendency to exaggerate for emotional emphasis. Anecdote: Back in the 1900's, one of my nieces routinely referred to her kid sister as the "spawn of the devil" and similar. Why? Until the birth of the younger, the older niece had been the baby of the family, and had her own bedroom. Plus normal sibling rivalry. Fast-forward 2 decades from that - and the two nieces were on perfectly friendly terms. The older one both got the younger one a nice office job, and was happy to have the younger one babysit her own small children.