[browardchad]

Isn't that an arts and crafts store??

Michael's in our area is mostly arts and crafts. I would assume they have Halloween and perhaps Christmas displays in the windows at this time of year -- could be relevant, since this is the second one targeted...

[Route66]

Perhaps the Michael's choice has some significance, but they also targeted several gas stations. Could be they just discovered that these locations provide easy targets and favorable physical layouts for their attacks.