Ragnar was apathetic when it came to wolves outside of Horizon Ridge of his own family. He had no reason to feel even the slightest concern for them and so he didn’t. It was also why he was not a overly huge advocate of alliances unless they proved to be purely beneficial — which they usually weren’t. Besides, if push came to shove on the front of “false alliances” he would put the welfare of his pack before the welfare of another’s which would potentially lead to said other pack’s demise. It was no chip off of the Viking’s shoulder because the less packs there were, the less compeition there was for food. The summer months when prey was bountiful was one thing, the winter was a whole other game. It was these months that Ragnar had led raids, stealing food and even wolves from pack lands, killing some but letting enough behind so they could reproduce and grow again for the next season when the Cove would resume pillaging. Ragnar didn’t make a habit of going to the same pack twice. Typically he would go to a pack and then the following winter hit a different one giving a false image of security before he would hit them again.
It was just the way of life.
Survival of the fittest; Ragnar had no qualms with doing what other men wouldn't do to ensure that he and his survived lacking that moral compass of 'right' and 'wrong' though Thistle liked to advocate differently.
Perhaps it was his own trick — of letting assumtions be made about his intelligence be made, only to move in for the kill in the most clever way that Ragnar could think of — working against him.