The 1874 RLDS edition switched the word order in this passage from were they to they were. The 1908 RLDS edition restored the original word order. Either order is possible after a prepositional phrase such as “in all these things”. For some discussion of the word order after sentence-initial adverbial elements, see under 2 Nephi 25:16.
Summary: Maintain in Alma 4:6 the original inverted word order were they after the sentence-initial adverbial “in all these things”.