Perfect
Some parallels:
Whitebeard was betrayed by his "son"
Garp was betrayed by his disciple
Whitebeard faced the navy in the "navy island" to save his "new son" (He believed ace would be the future king of the pirates)
Garp faced the pirates in the "pirate island" to save his "new disciple" (he believes koby is the future of navy)
Whitebeard was stabbed by a sneak attack
Garp was stabbed by a sneak attack
Whitebeard son, i.e, teach now is the "nakama" of garp former disciple