Maybe it's a matter of politics. There could be factions within the Central 46 that see Ichigo as an obstacle to their plans. For instance, if there are groups within the Soul Society that want to change the current power structure and Ichigo is seen as a symbol of the old or new order, depending on how you look at it, they would want him out of the way.
One possible motive could be fear. Ichigo is extremely powerful, and they might fear that he could one day turn against the Soul Society. So, to prevent any potential future threat, they order his death.
Another motive could be misinformation. The Central 46 might have been fed false information about Ichigo. They could think that he has committed some heinous crime against the Soul Society when in fact he's innocent. This would lead them to order his death based on false pretenses.
Chapter 5, ", The Small Bonfire [Asking for Fire!]", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Small fire pit: Can greatly increase the temperature in a ten-meter... and follows through with Xia Hong glanced back at the camp's people, and despite the cold, a....
Chapter 80, "Outsmarting the Frost Wolf Pack", is the clearest early answer because it turns Luo Ming's situation into a concrete plot event. The chapter turns that into something concrete by moving from How did we end up encountering a pack of Bone Spur Frost Wolves? to Seizing the opportunity, Xia Hong abruptly released his right hand,....
Chapter 93, "Regrouping at the Camp", is the clearest early answer because it turns Xia Chuan's situation into a concrete plot event. The setup is In the end, the four large knives fell into the hands of Luo Yuan,..., but the pressure keeps building through Leader, the one who lasted the longest among the remaining twenty-one....
Chapter 60, "Fool, Get on with It", is the clearest early answer because it turns Wood Puppet Monster's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Above the valley, at the point where two mountains intersect, a... and follows through with Eliminating the Wood Puppet Monster was indeed the most crucial task..
Chapter 139, "Resource Gap, Camp Changes [3 in 1]", is the clearest early answer because it turns Collection Team's situation into a concrete plot event. Early on, From the two interactions with them, one can see.. By the end, Why does this feel like it's calculated?. Inside the broader trade and resources storyline, it converts Collection Team into a tangible resource or opportunity, which changes the balance of leverage for Redwood Ridge and the surrounding arc.
Chapter 104, "Camp Strength, Rapid Enhancement (2-in-1 Large Chapter)", is the clearest early answer because it turns Cold Beast Meat's situation into a concrete plot event. The setup is Secondly, they are all well aware that if it weren't for Xia Hong's..., but the pressure keeps building through Even Luo Yuan, the Zhao brothers, and all the former Rogel Camp....
Chapter 77, "Luo Ming's Commission", is the clearest early answer because it turns Rogel Camp's situation into a concrete plot event. The setup is Leader Luo, what brings you here?" It was none other than Luo Ming..., but the pressure keeps building through While Xia Hong was somewhat surprised, seeing the tension on....
Chapter 512, "Just A Little More", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is The Forest of Twin Disasters did not rest., but the pressure keeps building through While others trained within reinforced walls and dreamed of futures....
Chapter 159, "Blood and Flesh Wall, The Leader Hasn't Broken Through Yet?", is the clearest early answer because it turns Luo Yuan's situation into a concrete plot event. It opens with At this moment, the scene outside the passage finally imprinted... and closes on Dozens of iron arrows shot through the many gaps in the wooden walls,....
Chapter 83, "Creating an Echo Chamber", is the clearest early answer because it turns Cold Beast Meat's situation into a concrete plot event. The chapter gives readers a real answer by opening on After several disasters, coupled with the recent encounter with the... and ending on No, even decades are unlikely, as they still need consumption..