Final answer:
The rival claims to Jerusalem increased the strain on the crusaders through infighting, diplomatic alliances, and the fragmentation of Jerusalem.
Step-by-step explanation:
The rival claims to Jerusalem increased the strain on the crusaders in several ways. One of the main impacts was that it caused infighting among crusader factions. The different Christian groups and leaders had conflicting interests and goals, leading to disagreements and conflicts among themselves.
Additionally, the rival claims created diplomatic alliances. Some crusader factions aligned themselves with other Christian powers or Muslim rulers in order to gain support and protection against their competitors.
Moreover, the rival claims did not lead to shared control of Jerusalem, but instead further divided the city and unified the crusader forces. Each faction sought to establish its own dominance over Jerusalem, intensifying the competition and leaving the crusaders more vulnerable to external threats.